Article 90-110

NM cable run above a drop in ceiling is considered exposed?

This motor disconnect is "in sight from" the motor

110.26 (A) (1) Working Space

A 277V to ground switchboard will be installed in an electrical room. The wall across the aisle from the switchboard will be a concrete-block wall

What is the minimum required working space in front of the switchboard?

Working Space

A 120V to ground switchboard will be installed in an electrical room. Across the aisle from this switchboard will be a 277V to ground switchboard.

What is the minimum required working space in front of the switchboard?