THIRD SUPPLEMENTAL INDENTURE GOVERNING 1.00% SENIOR CONVERTIBLE NOTES DUE 2012 OF GENERAL CABLE CORPORATION

Exhibit 4.3

THIRD SUPPLEMENTAL INDENTURE GOVERNING
1.00% SENIOR CONVERTIBLE NOTES DUE 2012
OF GENERAL CABLE CORPORATION

This THIRD SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of September 2, 2009, among Gepco International, Inc., an Illinois corporation (“Gepco”), and Isotec, Inc., an Illinois corporation (“Isotec” and together with Gepco, the “Guaranteeing Subsidiaries”), each a subsidiary of General Cable Corporation, a Delaware corporation (the “Company”), the Company, the other Guarantors (as defined in the Indenture referred to below) and U.S. Bank National Association, as trustee under the Indenture referred to below (the “Trustee”).

WITNESSETH

WHEREAS, the Company and certain initial Guarantors have heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of October 2, 2007, providing for the issuance of 1.00% Senior Convertible Notes due 2012 (the “Notes”); and

WHEREAS, the Company and certain Guarantors have heretofore executed and delivered to the Trustee the First Supplemental Indenture, dated as of October 31, 2007, pursuant to which seven additional Guarantors agreed to unconditionally guarantee all of the Company’s Obligations under the Notes and the Indenture on the terms and conditions set forth therein; and

WHEREAS, the Company and the Guarantors have heretofore executed and delivered to the Trustee the Second Supplemental Indenture, dated as of April 18, 2008, pursuant to which one additional Guarantor agreed to unconditionally guarantee all of the Company’s Obligations under the Notes and the Indenture on the terms and conditions set forth therein; and

WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiaries shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiaries shall unconditionally guarantee all of the Company’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Guarantee”); and

WHEREAS, pursuant to Section 10.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiaries and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1. CAPITALIZED TERMS. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2. AGREEMENT TO GUARANTEE. The Guaranteeing Subsidiaries hereby agree to provide a Guarantee on the terms and subject to the conditions set forth in the Guarantee, attached hereto as Exhibit A, and in the Indenture including, but not limited to, Article 12 thereof.

3. NO RECOURSE AGAINST OTHERS. No past, present or future director, officer, employee, incorporator, stockholder or agent of the Guaranteeing Subsidiaries, as such, shall have any liability for any obligations of the Company, the Guaranteeing Subsidiaries, or any other Guarantor, under the Notes, any Guarantee, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the Notes or any Guarantee by accepting

a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes and the Guarantee.

4. NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

5. COUNTERPARTS. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement.

6. EFFECT OF HEADINGS. The Section headings herein are for convenience only and shall not affect the construction hereof.

7. THE TRUSTEE. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiaries and the Company.

[SIGNATURE PAGE FOLLOWS]

IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed and attested, all as of the date first above written.

		SIGNATURES
		GENERAL CABLE CORPORATION
		By:		/s/ Robert J. Siverd
		Name:		Robert J. Siverd
		Title:		Executive Vice President, General Counsel and Secretary
		GEPCO INTERNATIONAL, INC.
		ISOTEC, INC.
		DIVERSIFIED CONTRACTORS, INC.
		GC GLOBAL HOLDINGS, INC.
		GENCA CORPORATION
		GENERAL CABLE CANADA, LTD.
		GENERAL CABLE COMPANY
		GENERAL CABLE INDUSTRIES, INC.
		GENERAL CABLE INDUSTRIES LLC
		GENERAL CABLE MANAGEMENT LLC
		GENERAL CABLE OVERSEAS HOLDINGS, LLC
		GENERAL CABLE TECHNOLOGIES CORPORATION
		GENERAL CABLE TEXAS OPERATIONS L.P.
		GK TECHNOLOGIES, INCORPORATED
		MARATHON MANUFACTURING HOLDINGS, INC.
		MARATHON STEEL COMPANY
		MLTC COMPANY
		PD WIRE & CABLE SALES CORPORATION
		PHELPS DODGE AFRICA CABLE CORPORATION
		PHELPS DODGE ENFIELD CORPORATION
		PHELPS DODGE INTERNATIONAL CORPORATION
		PHELPS DODGE NATIONAL CABLES CORPORATION
		By:		/s/ Brian J. Robinson
		Name:		Brian J. Robinson
		Title:		Executive Vice President
		U.S. BANK NATIONAL ASSOCIATION, AS TRUSTEE
		By:		/s/ Robert T. Jones
		Name:		Robert T. Jones
		Title:		Vice President

EXHIBIT A

FORM OF NOTATION OF GUARANTEE

For value received, each Guarantor (which term includes any successor Person under the Indenture) has, jointly and severally, unconditionally guaranteed, to the extent set forth in the Indenture and subject to the provisions in the Indenture, dated as of October 2, 2007 (the “Indenture”), among General Cable Corporation (the “Company”), the Guarantors party thereto and U.S. Bank National Association, as trustee (the “Trustee”), (a) the due and punctual payment of the principal of, premium and interest on the 1.00% Senior Convertible Notes due 2012 (the “Notes”) whether at the Final Maturity Date, by acceleration or otherwise, the due and punctual payment of interest on overdue principal of and interest on the Notes, if any, on a senior basis, if lawful, and the due and punctual performance of all other obligations of the Company to the Holders or the Trustee all in accordance with the terms of the Indenture and (b) in case of any extension of time of payment or renewal of any Notes or any of such other obligations, that the same will be promptly paid in full when due or performed in accordance with the terms of the extension or renewal, whether at the Final Maturity Date, by acceleration or otherwise. The obligations of the Guarantors to the Holders of Notes and to the Trustee pursuant to the Guarantee and the Indenture are expressly set forth in Article 12 of the Indenture, including the circumstances under which such obligations may be released, and reference is hereby made to the Indenture for the precise terms of the Guarantee. Each Holder of a Note, by accepting the same, agrees to and shall be bound by such provisions. This Guarantee may be released in accordance with the Indenture without any further act by any Holder.

Capitalized terms used but not defined herein have the meanings given to them in the Indenture.

September 2, 2009