Thermal Overload Protection

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Re: Thermal Overload Protection

mikesh #178146 05/24/08 11:10 AM

Joined: Mar 2004

Posts: 947

Regina, Sask.

T

twh

Member

Originally Posted by mikesh

No you don't have to add an overload. Sorry code book is not handy but section 28 does mention thermally protected motors.

Yes, in regards to overheating, which is not required on motors that don't need overload protection. (28-314 / 28-318 / 28-302) Am I missing something?

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Re: Thermal Overload Protection

mikesh #178751 06/10/08 08:36 PM

Joined: Dec 2007

Posts: 35

0nt.

H

homerjones Offline

Member

thermistors are part of the windings they are meant only to shut down the motor so that it doesnt overheat and burn

Re: Thermal Overload Protection

twh #178912 06/15/08 09:29 PM

Joined: Apr 2003

Posts: 13

Orillia,ON,Canada

T

ThorahSparky Offline

Junior Member

Originally Posted by twh

I think the confusion is about a $50 motor protected by $150 of overload devices.

Unless the Electrical Engineer on the jobs askes for it and, of course, you haven't put that into your estimate! Heck he'll probably ask for a NEMA 4 enclosure, hand/off/auto, push button off/on, and a min. of 1 1/4" EMT conduit feeding it! (crazy yes, you never know with EE)

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ECN Forum Forums Code Related Discussion Canadian Electrical Code Topics Thermal Overload Protection