310.14

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guschash

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I was ask what the markings were on Type SE Style U and SE Style R. What does U and R stand for. I can't find it in table 310.13.
 
I have no idea....the only mention I found of "Type SE Style U" was in:
310.14 Aluminum Conductor Material.

I am more along the lines of:
R - Riser ~ indoors or outdoors, exposed to direct sunlight, NOT underground
U - Underground

This convuluted thought process comes from the commentary following 338.1 ('02 NECH):
Type SE, cable for aboveground installation. Both the individual insulated conductors and the outer jacket or finish of Type SE are suitable for use where exposed to sun.
Type USE or USE-2, cable for underground installation, including burial directly in the earth....Types USE and USE-2 are not suitable for use in premises or above ground except to terminate at the service equipment or metering equipment.
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...although I don't see an "R" anywhere :)
 
I've heard that the U stands for "concentric," obviously referring to the concentric neutral. It makes more sense than "unarmored."
 
The southwire link I listed in my last post states under cable "construction" that the SER has a reinforcing tape under the jacket and the SEU does not.
 
I have no doubt 'R' stands for round.
I had always believed the 'U' meant flat as all SEU I have seen is flat.

However I have been shown that the 'U' stands for un-armored.

At one point typical SE cable was armored.
 
tmbrk said:
The southwire link I listed in my last post states under cable "construction" that the SER has a reinforcing tape under the jacket and the SEU does not.
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your right, I leave that jacket behind in crawl spaces, looks just like snake skin...:grin:
 
Dennis Alwon said:
Ser is a 4 wire service cale while seu is a 3 wire cable. USE is underground cable. I do not know what the U and R stand for.
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Thanks for the correction Dennis. That was a typo. I had to cut it short as something came up while I was posting.
 
j_erickson said:
Thanks for the correction Dennis. That was a typo. I had to cut it short as something came up while I was posting.
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YW, I knew that's what you meant otherwise you would have said it differently. Just wanted to make sure everyone else got it.
 
tmbrk said:
The southwire link I listed in my last post states under cable "construction" that the SER has a reinforcing tape under the jacket and the SEU does not.
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Actually, they both have the reinforcing tape. From the Southwire website:
Southwire Type SE, Style U Cable assembly plus an overall concentrically applied neutral and reinforcement tape are jacketed with gray sunlight resistant polyvinyl chloride (PVC).
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The "snakeskin stuff" that is under the jacket is the reinforcing tape.

 
I always assumed SEU was a 3 wire cable with the neutral being bare and wrapped around the other two cables. SER cable having all conductors with insulation and having a bare ground sized correctly. Both with the same outer covering.
 
Mike NY said:
I always assumed SEU was a 3 wire cable with the neutral being bare and wrapped around the other two cables. SER cable having all conductors with insulation and having a bare ground sized correctly. Both with the same outer covering.
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Thats my interpretation when ordering SE type wire...
 
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