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A rooftop unit motor has a running amp value on the equipment submittal and a much higher starting demand. What should the GC coordinate before rough-in?

Correct Answer

C) Confirm motor starters, disconnects, conductors, and protection are coordinated with the approved equipment data

Motors affect both mechanical equipment placement and electrical distribution. Before rough-in, the GC should coordinate starters, disconnects, conductors, and protection with the approved equipment data, including starting characteristics. Ignoring starting demand or waiting until set day risks rework.

Answer Options
A
Ignore motor starting because it affects only the mechanical contractor
B
The coordinator should use the nameplate running amps as the only electrical coordination item
C
Confirm motor starters, disconnects, conductors, and protection are coordinated with the approved equipment data
D
Delay electrical coordination until the unit is set on the roof

Why This Is the Correct Answer

Motors affect both mechanical equipment placement and electrical distribution. Before rough-in, the GC should coordinate starters, disconnects, conductors, and protection with the approved equipment data, including starting characteristics. Ignoring starting demand or waiting until set day risks rework.

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