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#74573 - 01/27/07 09:37 AM Conductor marking?
guschash Offline
Member

Registered: 01/25/07
Posts: 12
Loc: Walbridge,Ohio,wood
What does the markings U and R stand for in Type SE Style U and Type SE Style R. in 310.14

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#74574 - 01/27/07 09:45 AM Re: Conductor marking?
iwire Offline
Moderator

Registered: 01/05/03
Posts: 4343
Loc: North Attleboro, MA USA
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.
_________________________
Bob Badger
Construction & Maintenance Electrician
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#74575 - 01/27/07 12:46 PM Re: Conductor marking?
guschash Offline
Member

Registered: 01/25/07
Posts: 12
Loc: Walbridge,Ohio,wood
Ok, Thank you. I looked in the American Electricians Handbook,I couldn't find it I was sure it would be in there and it probably is but I didn't find it.

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#74576 - 01/27/07 02:40 PM Re: Conductor marking?
BigJohn Offline
Member

Registered: 03/06/04
Posts: 352
Loc: Boston, MA
Both Southwire and Encore Wire agree with Iwire. That's a lot of wires. Has anyone ever actually seen armored service cable?

-John

[This message has been edited by BigJohn (edited 01-27-2007).]

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#74577 - 01/28/07 01:05 AM Re: Conductor marking?
Lostazhell Offline
Member

Registered: 02/21/04
Posts: 1248
Loc: Bakersfield, CA (Originally Or...
so does AIW and Cerro Wire

 Quote:
SEU
Service Entrance Cable (type SE, style U). (Unarmored).

SER
Service round entrance cable (Type SE, Style R).


from Cerro Wire


[This message has been edited by Lostazhell (edited 01-28-2007).]

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#74578 - 01/28/07 04:26 AM Re: Conductor marking?
guschash Offline
Member

Registered: 01/25/07
Posts: 12
Loc: Walbridge,Ohio,wood
Thanks Lastazhell, After reading what it says under " U ", I am leaning towards " U " having to do with the way wire is layer in the cable.

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#74579 - 01/28/07 04:52 PM Re: Conductor marking?
Redsy Offline
Member

Registered: 03/28/01
Posts: 2138
Loc: Bucks County PA
...Has anyone ever actually seen armored service cable?...

Several years ago I sent in a picture of some ASE.

I don't know what happened to the picture, but it looks like standard SEU with a flat metal tape wrapped underneath the jacket.

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