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Topic Title: Contactor AC-1 & AC-1 ratings - for US UL508A
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Created On: 08 November 2017 11:16 AM
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 08 November 2017 11:16 AM
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simonturner83

Posts: 8
Joined: 10 March 2017

Hi,

I am currently designing an electrical control system for supply to the US, the design is based on UL508-A.

In terms of contactors, does anyone know if AC-1/AC-3 ratings are utilised in the US? And if not what is there an equivalent for AC-1 in the US?

For European designs, when speccing contactors we normally use the manufucturer's AC-1 and AC-3 ratings (depending on the use of the contactor).

In this application all the contactors will be Allen Bradley, however it appears they do not specify AC-1/AC-3 ratings for US 60Hz. Neither does UL508-A make any reference to this terminology.

Thanks in advance.

Simon
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