Exhibit 3.1

[Form of]

HUBBELL INCORPORATED

Amended and Restated Certificate of Incorporation

The certificate of incorporation of Hubbell Incorporated, as amended to date, is further amended and restated in its entirety to read as follows:

FIRST: That the name of the corporation is Hubbell Incorporated.

SECOND: That the principal office of said corporation shall be located in the Town of Shelton, County of Fairfield, in the State of Connecticut, or any other place the Board of Directors shall determine.

THIRD: That the nature of the business to be transacted, and the purposes to be promoted or carried out, by said corporation are as follows:

To manufacture, buy, sell, own and deal in machinery, tools, machine screws, electrical goods, supplies, apparatus, devices and fixtures of every character, material and description, and to buy, sell, own, and deal in letters patent and rights and licenses under letters patent, necessary or convenient for the prosecution of its business, and to grant rights and licenses to others under letters patent which may be owned by said corporation, and to buy, sell, mortgage, own and deal in such real estate as may be necessary or convenient for the prosecution of its business, and to engage in any other lawful business permitted under the laws of the State of Connecticut, and generally to do all things necessary or convenient for the prosecution of its business, and the proper conduct and management thereof.

FOURTH: A. The total number of shares of the capital stock of this corporation hereby authorized is 205,891,097 divided into 5,891,097 shares of Preferred Stock without par value, and 200,000,000 shares of Common Stock of the par value of $0.01 each.

B. Subject to any voting rights provided to holders of Preferred Stock at any time outstanding, the holder of record of each issued and outstanding share of Common Stock shall be entitled to have one (1) vote per share on each matter voted on at a shareholders’ meeting.

C. No holder of stock of the corporation of any class shall have any preemptive or other rights to subscribe to or purchase any new or additional or increased shares of stock of this corporation of any class or any scrip, rights, warrants, bonds or other obligations, security or evidences of indebtedness, whether or not convertible into or exchangeable for, or shall claim rights to purchase or otherwise acquire, shares of stock of the corporation of any class.

D The corporation may, to the extent of its unreserved and unrestricted capital surplus, (a) make distributions of cash or property to its shareholders with respect to its outstanding shares or any thereof, and (b) make purchases and permit conversions of its own shares for cash, securities or other property.

E.1 As provided for in the Reclassification Agreement, dated as of August 23, 2015, by and between the corporation and Bessemer Trust Company, N.A., in its capacity as trustee

(the “Reclassification Agreement”), upon the acceptance of this Amended and Restated Certificate of Incorporation by the office of the Secretary of the State of the State of Connecticut (the “Effective Time”), pursuant to the Connecticut Business Corporation Act, Chapter 601 of the Connecticut General Statutes:

(a) the holder of record of each share of the corporation’s Class A Common Stock, par value $0.01 per share (the “Class A Common Stock”), issued and outstanding immediately prior to the Effective Time shall be entitled to receive cash in the amount of Twenty-Eight Dollars ($28.00) for each share of Class A Common Stock held; and

(b) each share of Class A Common Stock issued and outstanding immediately prior to the Effective Time and each share of the corporation’s Class B Common Stock, par value $0.01 per share (the “Class B Common Stock”), issued and outstanding immediately prior to the Effective Time shall be reclassified into one (1) share of Common Stock authorized by paragraph A of this Article FOURTH and shall continue in existence as an issued and outstanding share of Common Stock.

E.2 Until surrendered as contemplated by the Reclassification Agreement (or, with respect to any shares held in uncertificated book-entry form, receipt of an appropriate agent’s message or other electronic confirmation), (a) each certificate or book-entry formerly representing Class A Common Stock shall be deemed, from and after the Effective Time, to represent the Common Stock into which such share of Class A Common Stock has been reclassified as contemplated by paragraph E.1.(b) of this Article FOURTH and the right to receive the amount of cash to which the holder thereof is entitled pursuant to paragraph E.1.(a) of this Article FOURTH and (b) each certificate or book-entry formerly representing Class B Common Stock shall be deemed, from and after the Effective Time, to represent the Common Stock into which such share of Class B Common Stock has been reclassified as contemplated by paragraph E.1.(b) of this Article FOURTH.

F. The Preferred Stock may be issued from time to time in series and each series shall be so designated as to distinguish the shares thereof from the shares of all other series. All shares of Preferred Stock shall be of equal rank and shall be identical except as expressly determined by the Board of Directors pursuant to this Article FOURTH. The Board of Directors is hereby expressly vested with authority to fix and determine the variations as among such series. Except as otherwise provided by law, the foregoing authority shall include without limitation with respect to each such series authority to fix and determine the number of shares thereof, the dividend rate, whether dividends shall be cumulative and, if so, from which date or dates, voting rights, liquidation rights, the redemption price or prices, if any, and the terms and conditions of the redemption, any sinking fund provisions for the redemption or purchase of shares of the series, and the terms and conditions on which the shares are convertible into Common Stock, if they are convertible. Before the issuance of shares of Preferred Stock any provision of which is fixed by the Board of Directors as hereinbefore set forth, the Board of Directors shall by its Resolution amend the Certificate of Incorporation as required by Section 33-666 of the Connecticut General Statutes.

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Series A Junior Participating Preferred Stock

1. Designation and Amount. There shall be a series of Preferred Stock that shall be designated as “Series A Junior Participating Preferred Stock,” and the number of shares constituting such series shall be [●]. Such number of shares may be increased or decreased by resolution of the Board of Directors and filing of a Certificate of Amendment to the Certificate of Incorporation of the corporation; provided, however, that no decrease shall reduce the number of shares of Series A Junior Participating Preferred Stock to less than the number of shares then issued and outstanding plus the number of shares issuable upon exercise of outstanding rights, options or warrants or upon conversion of outstanding securities issued by the corporation.

2. Dividends and Distribution.

(A) Subject to the prior and superior rights of the holders of any shares of any class or series of stock of the corporation ranking prior and superior to the shares of Series A Junior Participating Preferred Stock with respect to dividends, the holders of shares of Series A Junior Participating Preferred Stock, in preference to the holders of shares of any class or series of stock of the corporation ranking junior to the Series A Junior Participating Preferred Stock in respect thereof, shall be entitled to receive, when, as and if declared by the Board of Directors out of funds legally available for the purpose, quarterly dividends payable in cash on the 15th day of January, April, July and October, in each year (each such date being referred to herein as a “Quarterly Dividend Payment Date”), commencing on the first Quarterly Dividend Payment Date after the first issuance of a share or fraction of a share of Series A Junior Participating Preferred Stock, in an amount per share (rounded to the nearest cent) equal to the greater of (a) $10.00 and (b) the Adjustment Number (as defined below) times the aggregate per share amount of all cash dividends, and the Adjustment Number times the aggregate per share amount (payable in kind) of all non-cash dividends or other distributions other than a dividend payable in shares of Common Stock declared on the Common Stock or a subdivision of the outstanding shares of Common Stock (by reclassification or otherwise), since the immediately preceding Quarterly Dividend Payment Date or, with respect to the first Quarterly Dividend Payment Date, since the first issuance of any share or fraction of a share of Series A Junior Participating Preferred Stock. The “Adjustment Number” shall initially be 1000. In the event the corporation shall at any time after the date on which the Effective Time occurs (i) declare and pay any dividend on the Common Stock payable in shares of Common Stock, (ii) subdivide the outstanding Common Stock or (iii) combine the outstanding Common Stock into a smaller number of shares, then in each such case the Adjustment Number in effect immediately prior to such event shall be adjusted by multiplying such Adjustment Number by a fraction the numerator of which is the number of shares of Common Stock outstanding immediately after such event and the denominator of which is the number of shares of Common Stock that were outstanding immediately prior to such event.

(B) The corporation shall declare a dividend or distribution on the Series A Junior Participating Preferred Stock as provided in paragraph (A) above immediately after it declares a dividend or distribution on the Common Stock (other than a dividend payable in shares of Common Stock).

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(C) Dividends shall begin to accrue and be cumulative on outstanding shares of Series A Junior Participating Preferred Stock from the Quarterly Dividend Payment Date next preceding the date of issue of such shares of Series A Junior Participating Preferred Stock, unless the date of issue of such shares is prior to the record date for the first Quarterly Dividend Payment Date, in which case dividends on such shares shall begin to accrue from the date of issue of such shares, or unless the date of issue is a Quarterly Dividend Payment Date or is a date after the record date for the determination of holders of shares of Series A Junior Participating Preferred Stock entitled to receive a quarterly dividend and before such Quarterly Dividend Payment Date, in either of which events such dividends shall begin to accrue and be cumulative from such Quarterly Dividend Payment Date. Accrued but unpaid dividends shall not bear interest. Dividends paid on the shares of Series A Junior Participating Preferred Stock in an amount less than the total amount of such dividends at the time accrued and payable on such shares shall be allocated pro rata on a share-by-share basis among all such shares at the time outstanding. The Board of Directors may fix a record date for the determination of holders of shares of Series A Junior Participating Preferred Stock entitled to receive payment of a dividend or distribution declared thereon, which record date shall be no more than sixty (60) days prior to the date fixed for the payment thereof.

3. Voting Rights. The holders of shares of Series A Junior Participating Preferred Stock shall have the following voting rights:

(A) Each share of Series A Junior Participating Preferred Stock shall entitle the holder thereof to a number of votes equal to the Adjustment Number on all matters submitted to a vote of the shareholders of the corporation.

(B) Except as required by law and by Section 10 hereof, holders of Series A Junior Participating Preferred Stock shall have no special voting rights and their consent shall not be required (except to the extent they are entitled to vote with holders of Common Stock as set forth herein) for taking any corporate action.

(C) If, at the time of any annual meeting of shareholders for the election of directors, the equivalent of six quarterly dividends (whether or not consecutive) payable on any share or shares of Series A Junior Participating Preferred Stock are in default, the number of directors constituting the Board of Directors of the corporation shall be increased by two. In addition to voting together with the holders of Common Stock for the election of other directors of the corporation, the holders of record of the Series A Junior Participating Preferred Stock, voting separately as a class to the exclusion of the holders of Common Stock, shall be entitled at said meeting of shareholders (and at each subsequent annual meeting of shareholders), unless all dividends in arrears on the Series A Junior Participating Preferred Stock have been paid or declared and set apart for payment prior thereto, to vote for the election of two directors of the corporation, the holders of any Series A Junior Participating Preferred Stock being entitled to cast a number of votes per share of Series A Junior Participating Preferred Stock as is specified in paragraph (A) of this Section 3. Each such additional director shall serve until the next annual meeting of shareholders for the election of directors, or until his successor shall be elected and shall qualify, or until his right to hold such office terminates pursuant to the provisions of this paragraph (C). Until the default in payments of all dividends which permitted the election of said directors shall cease to exist, any director who shall have been so elected pursuant to the

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next preceding sentence may be removed at any time, without cause, only by the affirmative vote of the holders of the shares of Series A Junior Participating Preferred Stock at the time entitled to cast a majority of the votes entitled to be cast for the election of any such director at a special meeting of such holders called for that purpose, and any vacancy thereby created may be filled by the vote of such holders. If and when such default shall cease to exist, the holders of the Series A Junior Participating Preferred Stock shall be divested of the foregoing special voting rights, subject to revesting in the event of each and every subsequent like default in payments of dividends. Upon the termination of the foregoing special voting rights, the terms of office of all persons who may have been elected directors pursuant to said special voting rights shall forthwith terminate, and the number of directors constituting the Board of Directors shall be reduced by two. The voting rights granted by this paragraph (C) shall be in addition to any other voting rights granted to the holders of the Series A Junior Participating Preferred Stock in this Section 3.

4. Certain Restrictions.

(A) Whenever quarterly dividends or other dividends or distributions payable on the Series A Junior Participating Preferred Stock as provided in Section 2 are in arrears, thereafter and until all accrued and unpaid dividends and distributions, whether or not declared, on shares of Series A Junior Participating Preferred Stock outstanding shall have been paid in full, the corporation shall not:

(i) declare or pay dividends on, make any other distributions on, or redeem or purchase or otherwise acquire for consideration any shares of stock ranking junior (either as to dividends or upon liquidation, dissolution or winding up) to the Series A Junior Participating Preferred Stock;

(ii) declare or pay dividends on or make any other distributions on any shares of stock ranking on a parity (either as to dividends or upon liquidation, dissolution or winding up) with the Series A Junior Participating Preferred Stock, except dividends paid ratably on the Series A Junior Participating Preferred Stock and all such parity stock on which dividends are payable or in arrears in proportion to the total amounts to which the holders of all such shares are then entitled; or

(iii) purchase or otherwise acquire for consideration any shares of Series A Junior Participating Preferred Stock, or any shares of stock ranking on a parity with the Series A Junior Participating Preferred Stock, except in accordance with a purchase offer made in writing or by publication (as determined by the Board of Directors) to all holders of Series A Junior Participating Preferred Stock, or to such holders and holders of any such shares ranking on a parity therewith, upon such terms as the Board of Directors, after consideration of the respective annual dividend rates and other relative rights and preferences of the respective series and classes, shall determine in good faith will result in fair and equitable treatment among the respective series or classes.

(B) The corporation shall not permit any subsidiary of the corporation to purchase or otherwise acquire for consideration any shares of stock of the corporation unless the corporation could, under paragraph (A) of this Section 4, purchase or otherwise acquire such shares at such time and in such manner.

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5. Reacquired Shares. Any shares of Series A Junior Participating Preferred Stock purchased or otherwise acquired by the corporation in any manner whatsoever shall thereupon become authorized but unissued shares of Preferred Stock and may be reissued as part of a new series of Preferred Stock to be created by resolution or resolutions of the Board of Directors, subject to any conditions and restrictions on issuance set forth herein.

6. Liquidation, Dissolution or Winding Up.

(A) Upon any liquidation, dissolution or winding up of the corporation, voluntary or otherwise, no distribution shall be made to the holders of shares of stock ranking junior (either as to dividends or upon liquidation, dissolution or winding up) to the Series A Junior Participating Preferred Stock unless, prior thereto, the holders of shares of Series A Junior Participating Preferred Stock shall have received an amount per share (the “Series A Liquidation Preference”) equal to the greater of (i) $100 plus an amount equal to accrued and unpaid dividends and distributions thereon, whether or not declared, to the date of such payment and (ii) the Adjustment Number times the per share amount of all cash and other property to be distributed in respect of the Common Stock upon such liquidation, dissolution or winding up of the corporation.

(B) In the event, however, that there are not sufficient assets available to permit payment in full of the Series A Liquidation Preference and the liquidation preferences of all other classes and series of stock of the corporation, if any, that rank on a parity with the Series A Junior Participating Preferred Stock in respect thereof, then the assets available for such distribution shall be distributed ratably to the holders of the Series A Junior Participating Preferred Stock and the holders of such parity shares in proportion to their respective liquidation preferences.

(C) Neither the merger or consolidation of the corporation into or with another corporation nor the merger or consolidation of any other corporation into or with the corporation shall be deemed to be a liquidation, dissolution or winding up of the corporation within the meaning of this Section 6.

7. Consolidation, Merger, Etc. In case the corporation shall enter into any consolidation, merger, combination or other transaction in which the outstanding shares of Common Stock are exchanged for or changed into other stock or securities, cash and/or any other property, then in any such case each share of Series A Junior Participating Preferred Stock shall at the same time be similarly exchanged or changed in an amount per share equal to the Adjustment Number times the aggregate amount of stock, securities, cash and/or any other property (payable in kind), as the case may be, into which or for which each share of Common Stock is changed or exchanged.

8. No Redemption. Shares of Series A Junior Participating Preferred Stock shall not be subject to redemption by the corporation.

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9. Ranking. The Series A Junior Participating Preferred Stock shall rank (a) junior to all other series of the Preferred Stock as to the payment of dividends and as to the distribution of assets upon liquidation, dissolution or winding up, unless the terms of any such series shall provide otherwise and (b) senior to the Common Stock as to such matters.

10. Amendment. At any time that any shares of Series A Junior Participating Preferred Stock are outstanding, the Certificate of Incorporation of the corporation shall not be amended in any manner which would materially alter or change the powers, preferences or special rights of the Series A Junior Participating Preferred Stock so as to affect them adversely without the affirmative vote of the holders of two-thirds of the outstanding shares of Series A Junior Participating Preferred Stock, voting separately as a class.

11. Fractional Shares. Series A Junior Participating Preferred Stock may be issued in fractions of a share that shall entitle the holder, in proportion to such holder’s fractional shares, to exercise voting rights, receive dividends, participate in distributions and to have the benefit of all other rights of holders of Series A Junior Participating Preferred Stock.

FIFTH: That the duration of the corporation is unlimited.

SIXTH: The personal liability of any Director to the corporation or its shareholders for monetary damages for breach of duty as a Director is hereby limited to the amount of the compensation received by the Director for serving the corporation during the year of the violation if such breach did not (i) involve a knowing and culpable violation of law by the Director, (ii) enable the Director or an associate, as defined in Section 33-840 of the Connecticut General Statutes, to receive an improper personal economic gain, (iii) show a lack of good faith and a conscious disregard for the duty of the Director to the corporation under circumstances in which the Director was aware that his conduct or omission created an unjustifiable risk of serious injury to the corporation, (iv) constitute a sustained and unexcused pattern of inattention that amounted to an abdication of the Director’s duty to the corporation, or (v) create liability under Section 33-757 of the Connecticut General Statutes. This provision shall not limit or preclude the liability of a Director for any act or omission occurring prior to the date this provision becomes effective. Any lawful repeal or modification of this provision by the shareholders and the Board of Directors of the corporation shall not adversely affect any right or protection of a Director existing at or prior to the time of such repeal or modification.

SEVENTH: A. The corporation shall, to the fullest extent permitted by law, indemnify its Directors from and against any and all of the liabilities, expenses and other matters referenced in or covered by the Connecticut Business Corporation Act. In furtherance and not in limitation thereof, the corporation shall indemnify each Director for liability, as defined in subsection (3) of Section 33-770 of the Connecticut General Statutes, to any person for any action taken, or any failure to take any action, as a Director, except liability that (i) involved a knowing and culpable violation of law by the Director, (ii) enabled the Director or an associate, as defined in Section 33-840 of the Connecticut General Statutes, to receive an improper personal economic gain, (iii) showed a lack of good faith and conscious disregard for the duty of the Director to the corporation under circumstances in which the Director was aware that his conduct or omission created an unjustifiable risk of serious injury to the corporation, (iv) constituted a sustained and unexcused pattern of inattention that amounted to an abdication of the Director’s duty to the

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corporation, or (v) created liability under Section 33-757 of the Connecticut General Statutes; provided that nothing in this sentence shall affect the indemnification of or advance of expenses to a Director for any liability stemming from acts or omissions occurring prior to the effective date of this Article SEVENTH.

The corporation shall indemnify each officer of the corporation who is not a Director, or who is a Director but is made a party to a proceeding in his capacity solely as an officer, to the same extent as the corporation is permitted to provide the same to a Director, and may indemnify such persons to the extent permitted by Section 33-776 of the Connecticut General Statutes.

The indemnification provided for herein shall not be deemed exclusive of any other rights to which those indemnified may be entitled under any bylaw, agreement, vote of shareholders or disinterested Directors or otherwise, both as to action in such person’s official capacity and as to action in another capacity while holding such office, and shall continue as to a person who has ceased to be a Director or officer and shall inure to the benefit of the heirs, executors and administrators of such a person.

B. Expenses incurred by a Director or officer of the corporation in defending a civil or criminal action, suit or proceeding shall be paid for or reimbursed by the corporation to the fullest extent permitted by law in advance of the final disposition of such action, suit or proceeding upon receipt of an undertaking by or on behalf of such Director or officer to repay such amount if it shall be ultimately determined that such Director or officer is not entitled to be indemnified by the corporation.

C. The corporation may indemnify and pay for or reimburse the expenses of employees and agents not otherwise entitled to indemnification pursuant to this Article SEVENTH on such terms and conditions as may be established by the Board of Directors.

D. No amendment to or repeal of this Article SEVENTH shall apply to or have any effect on the indemnification of any Director, officer, employee or agent of the corporation for or with respect to any acts or omissions of such Director, officer, employee or agent occurring prior to such amendment or repeal, nor shall any such amendment or repeal apply to or have any effect on the obligations of the corporation to pay for or reimburse in advance expenses incurred by a Director, officer, employee or agent of the corporation in defending any action, suit or proceeding arising out of or with respect to any acts or omissions occurring prior to such amendment or repeal.

EIGHTH: References in this Amended and Restated Certificate of Incorporation to sections of the Connecticut General Statutes shall be deemed to include amendments adopted from time to time to such sections and shall further be deemed to include any successor sections thereto.

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