Extended Voltage Range Motors?

[Mustangx3]

Sooo, just what is an "extended voltage range motor" and why would they not be allowed by a contract document for industrial building construction?

Any ideas?

 

[mdshunk]

An example of a motor with extended voltage range would be one that says 208-240 on the dataplate.

 

[iwire]

why would they not be allowed by a contract document for industrial building construction?

My guess is that they would not be as efficient as one designed for the particular voltage supplied.

 

[mdshunk]

It is a government spec you see a lot. I've never seen it spec'd in other than government work.

1.6.1 New Work
Provide electrical components of mechanical equipment, such as motors,
motor starters, control or push-button stations, float or pressure
switches, solenoid valves, integral disconnects, and other devices
functioning to control mechanical equipment, as well as control wiring and
conduit for circuits rated 100 volts or less, to conform with the
requirements of the section covering the mechanical equipment. Extended
voltage range motors shall not be permitted. The interconnecting power
wiring and conduit, control wiring rated 120 volts (nominal) and conduit,
and the electrical power circuits shall be provided under Division 16,
except internal wiring for components of package equipment shall be
provided as an integral part of the equipment. When motors and equipment
furnished are larger than sizes indicated, provide any required changes to
the electrical service as may be necessary and related work as a part of
the work for the section specifying that motor or equipment.