(2) Large Equipment. For equipment rated 1200 amperes or more and over 1.8 m (6 ft) wide 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 and 2.0 m (61?2 ft) high at each end of the working space.
A single entrance to and egress from the required working space shall be permitted where either of the conditions in 110.26(C)(2)(a) or (C)(2)(b) is met.
(a) Unobstructed Egress. Where the location permits a continuous and unobstructed way of egress travel, a single entrance to the working space shall be permitted.
(b) Extra Working Space. Where the depth of the working space is twice that required by 110.26(A)(1), a single entrance shall be permitted. It shall be located such that the distance from the equipment to the nearest edge of the entrance is not less than the minimum clear distance specified in Table 110.26(A)(1) for equipment operating at that voltage and in that condition.
From your description you probably can not satisfy double the working space as stated above. So that leaves you 110.26(C)(2)(a).
As far as working space in front of the equipment you need 36".
