Exhibit 10.58

SPX CORPORATION

AMENDMENT TO THE

SPX CORPORATION SUPPLEMENTAL RETIREMENT PLAN
FOR TOP MANAGEMENT

Pursuant to the powers of amendment reserved in Section 6.1 of the SPX
Corporation Supplemental Retirement Plan for Top Management (the “Plan”), SPX
Corporation hereby amends the Plan in the following manner:

1.             Effective as of October 2, 2006, the Plan is amended by adding
the new Appendix K attached hereto to the end thereof.

2.             Effective as of December 13, 2006, the Plan is amended by adding
the new Appendix L attached hereto to the end thereof.

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Appendix K

Special Provisions for Sharon K. Jenkins

Sharon K. Jenkins will be treated (i) as though she were a participant in this
Plan beginning on October 2, 2006, the date she was named an officer of SPX
Corporation (i.e., Continuous Service shall commence as of such date) for
purposes of determining the amount of benefits payable to her under this Plan
and (ii) as though she were a participant in the SPX Qualified Plan for purposes
of determining the eligibility for benefits and the amount of benefits under the
Plan.

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Appendix L

Special Provisions for James A. Peters

James A. Peters will be treated as though he were a participant in this Plan
beginning on December 13, 2006, the date he was named an officer of SPX
Corporation (i.e., Continuous Service shall commence as of such date) for
purposes of determining the amount of benefits payable to him under this Plan.

 

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