Hi Tony, Yes SER falls under article 338. The "R" to my understanding means raceway, if you have more than 3 conductors. Table 310-15(b)(6) rate SER #2 copper for 125 amps and 100 amps for aluminum. Hope this helps. Joe
I am glad I'm not the only one a little confused. I am using it to feed a sub panel for a 3 ton heat pump rather than use 2 separate circuits for heat strips and compressor. Plus I need to mount a recptacle near the unit. So because of all this I think it falls under 310-16. So is this classified as a feeder or a branch circuit?
Branch circuit or feeder (in your case it is a feeder), table 310.16 applies. Chances are your SER cable contains aluminum XHHW and you would need to apply the 75 Deg. cloumn. Assuming, as iwire said, that the terminal temp. rarings are 75. I've yet to see modern terminals that are only rated to 60. Table 310.15 only applies where the conductors are either Service Entrance conductors, of a Feeder which is the main power feeder to a dwelling (that is not the case with your feeder). This would be the case, however, where a Service Panel is remote from the Service Disconnect. Then the feeder between the disconnect and the panel would be applicable to Table 310.15(B).
That being said, I regularly see #2 SER, protected at 100 amps feeding subpanels, and they have been approved.
[This message has been edited by Redsy (edited 06-19-2003).]
In a different direction, why do so many electriciaqns think it is OK to use SER Aluminum in PVC conduit, underground? I thought that AL ser had to be identified for such use. This week I inspected a pool installation where the sparky installed AL ser underground in PVC to a sub panel in the detached garage, with branch circuits to the pool. He got a red tag. Any comments?
I had always Thought that either cable could be used in underground conduit because both have conductors that are listed for wet locations. The restriction that I was aware of was that one could not use type USE above ground or in structures because it lacked a fire Retardant outer cover. Have I had this wrong all these years?
338.2 Definitions. Service-Entrance Cable. A single conductor or multiconductor assembly provided with or without an overall covering, primarily used for services, and of the following types: Type SE. Service-entrance cable having a flame-retardant, moisture-resistant covering. Type USE. Service-entrance cable, identified for underground use, having a moisture-resistant covering, but not required to have a flame-retardant covering. -- Tom
"This alternating current stuff is just a fad. It is much too dangerous for general use" Thomas Alva Edison