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Bulletin 503
Bulletin 503
Bulletin 503
- NEMA contactor sizes 0…5
- Circuit breaker thermal magnetic (inverse time)
- Painted metal enclosures: Type 1, Type 3R/4/12
- Stainless steel enclosures: Type 4/4X
- Non-metallic enclosures: Type 4/4X
- Modifications — factory installed
- Accessories — field installed
- Service entrance rated
A Bulletin 503 combination contactor consists of a Bulletin 500, 3-pole contactor, and a thermal magnetic circuit breaker (inverse time) mounted in a common enclosure.
