Generator Lugs and Such...

[MrsFooter]

Doing a little research for unrelated reasons has me looking into the rating of generator lugs and their meanings. I've managed to discern that an AL9CU lug is rated for both aluminum and copper conductors up to a temperature of 90 degrees Celsius. This makes sense to me, especially when compared to lugs rated AL7CU. However, I have also seen the rating AL/CU. Does that mean they're rated for...no heat? I'm not really sure what to make of that one, and can't seem to find an explanation. (Though I have some suspicions.)

Any thoughts or suggestions for resources would be appreciate.

 

[headcrab]

Sounds like they'd be rated for 60°C operation.

 

[STEVETERRY]

Doing a little research for unrelated reasons has me looking into the rating of generator lugs and their meanings. I've managed to discern that an AL9CU lug is rated for both aluminum and copper conductors up to a temperature of 90 degrees Celsius. This makes sense to me, especially when compared to lugs rated AL7CU. However, I have also seen the rating AL/CU. Does that mean they're rated for...no heat? I'm not really sure what to make of that one, and can't seem to find an explanation. (Though I have some suspicions.)

Any thoughts or suggestions for resources would be appreciate.

Try the Ilsco catalog:

http://www.ilsco.com/e2wShoppingCatalog.aspx?parentId=2100001183&parentLink=2100001183

ST

 

[Dswalecphoto]

An interesting PDF version of a data bulletin from Square-D is available here
https://www.google.com/url?sa=t&rct...01.pdf&usg=AFQjCNFoyVXyKeDqycGVU04i6vWIv9tQmQ
that digs into wire temperature ratings and terminations, and specifically has a section outlining AL/CU and AL9CU lugs.

 

[STEVETERRY]

An interesting PDF version of a data bulletin from Square-D is available here
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&ved=0ahUKEwjki4ysq4zLAhXDWh4KHTKMB-QQFggpMAI&url=http://static.schneider-electric.us/docs/Power%20Management/0110DB9901.pdf&usg=AFQjCNFoyVXyKeDqycGVU04i6vWIv9tQmQ
that digs into wire temperature ratings and terminations, and specifically has a section outlining AL/CU and AL9CU lugs.

That is indeed an excellent application note. However, it was published in 2002, so its NEC references are four editions out of date. Proceed with caution.

ST