ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Violation?
by renosteinke - 01/27/23 09:52 PM
Does NEC 551.71 (F) apply to dwellings?
by BigB - 01/20/23 10:46 AM
Power submeter connections
by HotLine1 - 01/19/23 09:09 AM
AFDD's coming to the UK
by Texas_Ranger - 01/17/23 07:22 PM
New in the Gallery:
Burger King crown sillyness
Burger King crown sillyness
by wa2ise, December 11
240/208 to a house
240/208 to a house
by wa2ise, October 9
Who's Online Now
0 members (), 98 guests, and 12 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#213316 04/09/14 01:54 PM
Joined: Jan 2005
Posts: 65
P
petey_c Offline OP
Member
I've been asked to bid on a job that would either require me to trench (rather not) or go overhead about 70'. I've never done this before. What type of wire should I use?
Pete

Joined: Apr 2002
Posts: 7,333
Likes: 7
Member
'Triplex' or 'quadplex' dependent on the load.

Both are similar/exact of what the POCOs use for drops.

Check with your local zoning dept and AHJ for any local issues that may arise before you start



John
Joined: Jun 2004
Posts: 1,273
T
Member
Stay with aluminum on O/H feeders.

Copper weighs a ton.

%%%

We take it for granted that you've installed O/H feeders before.

If not, there's some learning to be had.

1) Robust anchor points

2) Weather factors (wind, icing,...)

3) Getting up there and working safely (bucket truck?)

4) Crew size

5) Clearances (local rules dominate)

6) Building entry

7) Are you in a mandatory Underground zone?

(Prior installations can be deceptive. The AHJ can insist on underground (new) feeders based upon (recent) local zoning. Out my way, O/H feeders are prohibited. Only the Poco has O/H transmission lines.)

A mere seventy-feet of PVC would have me going underground -- not overhead -- unless the ground was brutal. I'd just rent a trencher.




Last edited by Tesla; 04/09/14 05:55 PM.

Tesla
Joined: Dec 2000
Posts: 4,291
Member

As John said,

The POCO uses this and this for their overhead drops.

The triplex has code names named after molluscs and crustaceans. The quadruplex is named after breeds of horses laugh


Joined: Apr 2002
Posts: 7,333
Likes: 7
Member
Electure:
Thanks for the pics, they are worth 1000 words.

Most important is a chat with the local zoning & AHJ as Tesla also mentioned. O/H is allowed in some situations here, but unusual. Some fall in Rehab, some are 'temp' to restore site lighting, pending permanent repairs.

Last edited by HotLine1; 04/10/14 08:45 AM.

John

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *
2023 National Electrical Code (NEC)
2023 NEC Now Available!
 
* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Theelectrikid
Theelectrikid
Levittown, PA
Posts: 812
Joined: April 2004
Top Posters(30 Days)
BigB 8
triple 3
Popular Topics(Views)
302,672 Are you busy
231,946 Re: Forum
216,605 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5