UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q/A

Amendment No. 1

(Mark One)

For the quarterly period ended September 28, 2012

OR

For the transition period from                      to                     

Commission file number: 1-12983

GENERAL CABLE CORPORATION

(Exact name of registrant as specified in its charter)

(859) 572-8000

(Registrant’s telephone number, including area code)

Not Applicable

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date:

EXPLANATORY NOTE

General Cable Corporation (the “Company”) is filing this amendment to its quarterly report on Form 10-Q (the “Form 10-Q”), originally filed with the Securities and Exchange Commission on March 1, 2013, solely to (i) file Exhibit 10.1 which was inadvertently omitted from the original Form 10-Q filing, and (ii) to correct and update the Exhibit List. Pursuant to Rule 12b-15 under the Securities Exchange Act of 1934, as amended, this amendment restates in its entirety Item 6 of the Form 10-Q and contains new certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, which are filed herewith. Because no financial statements have been included in this amendment and this amendment does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4, and 5 of such certifications have been omitted.

Except as described above, this amendment does not reflect events occurring after the filing of the original Form 10-Q and no revisions are being made pursuant to this amendment to the Company’s financial statements or any other disclosure contained in the Form 10-Q.

PART II — OTHER INFORMATION

The following exhibits are filed or furnished, as applicable, herewith or incorporated herein by reference. Documents indicated by an asterisk (*) are filed or furnished, as applicable, herewith. Documents indicated by a double asterisk (**) were previously filed or furnished, as applicable, with the original Form 10-Q. Documents not indicated by an asterisk are incorporated by reference to the document indicated.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, General Cable Corporation has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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EXHIBIT INDEX

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