Multiple Combination Motor Starter in a Single Enclosure
- Thread starter glluga
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petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- Semi-retired engineer
The manufacturer of the starter can tell you how much heat each coil will generate when energized. Add them up to find the total heat generated.
Plenty of thermal calculators out there that can tell you what the heat rise will be inside the enclosure.
I don't usually bother unless there are a lot of starters and even then I have yet to find a case where I needed even a fan.
It does help to put a stirring fan inside the enclosure though. This is a small fan that just moves the air around a little bit inside the cabinet.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
In my state our control panels are required to be UL508A, or equal, listed. The NEC does not apply to control panels, which is why you don't see a lot of specific answers here. You can purchase a copy of UL508A.
There is article on control panels, 409?, in the NEC, but in all my 20 years as a moderator I have never seen it mentioned, except just now!
There is article on control panels, 409?, in the NEC, but in all my 20 years as a moderator I have never seen it mentioned, except just now!
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- Semi-retired engineer
It has been mentioned here many times.
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