PART XXVI ELECTRICAL OPERATIONS — Grounding portable low voltage electrical equipment
488
(1) Portable electrical equipment having double insulation or equivalent protection and so marked, is not required to be grounded.
488(2)
Portable electrical equipment, required to be grounded and not permanently connected to the wiring system, shall be effectively grounded by the use of approved cords and polarized plugs inserted in grounded polarized receptacles.
Not legal advice. Verify the cited article against the signed agreement.