Third Amendment, dated December 4, 2019, to Hubbell Incorporated Amended and Restated Top Hat Restoration Plan, as amended and restated effective January 1, 2005

“4.1 A Participant’s Retirement Benefit under this Plan shall be the excess of (a) over (b), where:

(a)    (I) for periods prior to January 1, 2020, equals the applicable Early, Normal, Late, Deferred Vested or Disability Retirement benefit to which the Participant is entitled under the Hubbell Retirement Plan (subject to the freeze on credited service effective as of February 28, 2017 and the freeze on all benefit accruals effective as of December 31, 2020) as if the calculation were performed (i) without applying the Compensation Cap and Defined Benefit Maximum, (ii) including compensation amounts deferred by such Participant under the Hubbell Incorporated Executive Deferred Compensation Plan (as if such amounts had not been so deferred), and

(II) for periods on and after January 1, 2020, equals the applicable Early, Normal, Late, Deferred Vested or Disability Retirement benefit to which the Participant would be entitled under the Hubbell Retirement Plan (subject to the freeze on credited service effective as of February 28, 2017 and the freeze on all benefit accruals effective as of December 31, 2020) as if the calculation were performed (i) without applying the Compensation Cap and Defined Benefit Maximum, and (ii) using the following as the definition of Compensation: “Compensation means Base Salary plus Bonus, where (x) “Base Salary” means the base or regular cash salary relating to service performed during any calendar year, excluding distributions from nonqualified deferred

compensation plans, bonuses, commissions, overtime, fringe benefits, stock options, relocation expenses, incentive payments, non-monetary awards and automobile and other allowances paid to a Participant for services rendered (whether or not such amounts are included in the Employee’s gross income); (y) “Bonus” means any cash incentive or bonus compensation and commission payments payable in a Plan Year that is in addition to Base Salary, earned by a Participant under any Employer’s annual bonus and cash incentive plans, but shall not include any stock option, stock appreciation rights, other equity-based incentive award or a replacement of an award originally granted as equity compensation, retention bonus or fringe benefits; and (z) Base Salary and Bonus shall each be calculated before reduction for compensation voluntarily deferred or contributed by the Participant pursuant to all qualified or nonqualified plans of any Employer and shall be calculated to include amounts not otherwise included in the Participant’s gross income under Code Sections 125, 402(e)(3), 402(h), or 403(b) pursuant to plans established by any Employer; provided, however, that all such amounts will be included in compensation only to the extent that had there been no such plan, the amount would have been payable in cash to the Employee.

(b)    equals the applicable Early, Normal, Late, Deferred Vested or Disability Retirement benefit to which the Participant is entitled under the Hubbell Retirement Plan.

For purposes of the above calculations, it shall be assumed that the Participant’s benefit under the Hubbell Retirement Plan is a single life annuity commencing on such Participant’s Separation from Service or, if later, the date on which such Participant would attain age 55, regardless of when such benefit actually commences.”