110.26 (C) (2) Large Equipment.
For large equipment that contains overcurrent devices, switching devices, or control devices, there shall be one entrance to and egress from the required working space not less than 610 mm (24 in.) wide
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NEC 110.26 Spaces About Electrical Equipment
For large equipment that contains overcurrent devices, switching devices, or control devices, there shall be one entrance to and egress from the required working space not less than 610 mm (24 in.) wide
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1910.303
At least one entrance of sufficient area shall be provided to give access to the working space about electric equipment.
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