ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Linear Power Supply Quits Under Load
by sabrown. 10/17/18 05:06 PM
220/230/240V 60Hz Systems
by dsk. 10/17/18 01:25 PM
SCADA interview questions and answers 2019
by niamishra. 10/17/18 03:26 AM
PLC/HMI Enclosure C2, D1
by ghost307. 10/16/18 03:31 PM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 7 guests, and 25 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Overhead wire type? #213316
04/09/14 02:54 PM
04/09/14 02:54 PM
P
petey_c  Offline OP
Member
Joined: Jan 2005
Posts: 65
Miller Place, NY USA
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

Work Gear for Electricians and the Trades
Re: Overhead wire type? [Re: petey_c] #213317
04/09/14 03:51 PM
04/09/14 03:51 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 7,035
Brick, NJ USA
'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
Re: Overhead wire type? [Re: petey_c] #213318
04/09/14 06:42 PM
04/09/14 06:42 PM
T
Tesla  Offline
Member
Joined: Jun 2004
Posts: 1,273
Sacramento, CA
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 06:55 PM.

Tesla
Re: Overhead wire type? [Re: petey_c] #213319
04/09/14 10:49 PM
04/09/14 10:49 PM
electure  Offline

Member
Joined: Dec 2000
Posts: 4,274
Fullerton, CA USA

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


Re: Overhead wire type? [Re: petey_c] #213320
04/10/14 09:41 AM
04/10/14 09:41 AM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 7,035
Brick, NJ USA
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 09:45 AM.

John

Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Posts: 165
Joined: March 2007
Show All Member Profiles 
Top Posters(30 Days)
sparky 11
Popular Topics(Views)
250,370 Are you busy
187,982 Re: Forum
177,527 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.026s Queries: 15 (0.005s) Memory: 0.9696 MB (Peak: 1.1107 MB) Zlib enabled. Server Time: 2018-10-18 05:03:46 UTC