Exam 3: Feeder Bus System

Feeder busway sections are available in standard________ ft lengths and in other lengths on special order.

The connection of the busway to enclosures such as unit substations is accomplished with ________.

The plug-in unit size of a bus plug is based on the________ .

The busbars in the busway are coated with________ at each connection point since it is unequaled as an electrical conductor.

In feeder busway No. 2,________ snap-on covers insulate the bolted busbar sections.

Describe the circuit-breaker cubicle.

For feeder busway No. 2, rated at 1600 amperes, what is the current density in busbars with cross-sectional area of 394 square millimeters?

Busways held up by cables must all be supported at intervals of________ ft or less.

________cubicles are used to connect the No. 2 feeder busway to the 225-ampere, plug-in busway runs.

Straight sections, elbows, tees, and ________are standard components available for use so that ducts can be installed horizontally or vertically, edgewise or flat, and can meet any turn or elevation requirements.

What are the possible structures of plug-in busway fittings?

How are bus plugs selected?

The plug-in busway is much like a________ extending through a complete load area.

Power can be tapped from the feeder busway at any ________opening.

________provide branch-circuit protection for each of the machines in the manufacturing area of the plant.

What is the common name used by electricians for the assembly properly known as a busway?

________clamp hangers eliminate the drilling, cutting, or bending generally associated with hangers constructed on the job.

Tapoff openings every ________inches along the plug-in busway mean that there is always a convenient location to connect a machine.

How are plug-in busways suspended?

What is an additional role of connecting busways to enclosures such as unit substations?