The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!


2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Parking lot pole light swap....
by gfretwell
10/24/16 08:46 PM
International Wire Colour Codes
by Tjia1981
10/23/16 12:08 PM
Son of Sparky
by HotLine1
10/20/16 07:43 PM
Speaking of Plugmold ...
by gfretwell
10/17/16 02:37 PM
Broken battery charger? Check for cobwebs!
by gfretwell
10/17/16 02:30 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 14
HotLine1 7
ghost307 7
renosteinke 6
Potseal 4
Who's Online
0 registered (), 81 Guests and 5 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#7677 - 02/15/02 09:09 AM Fifth terminal
electrician02125 Offline

Registered: 02/01/01
Posts: 90
Can someone out there explain to me the term fifth terminal with respect to meter sockets.

Why would you need it or not ?

Depending on the month around my neck of the woods, you may need it or not.

I am in the maintenance end of the trade and
try to stay current on residential as much as possible.

Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#7678 - 02/15/02 10:29 AM Re: Fifth terminal
Redsy Offline

Registered: 03/28/01
Posts: 2138
Loc: Bucks County PA
Our utility (PECO) requires a 5th jaw to meter an existing 120 volt service, and also to meter a single phase 208/120 service supplied from a 3 phase system. Although I don't know how it functions, according to our utility co. drawings, it provides a neutral connection to the meter. Your utility company should have an installation guide book which will include drawings.
Maybe someone else here can explain the function.

#7679 - 02/16/02 12:16 PM Re: Fifth terminal
CanadianSparky Offline

Registered: 03/05/01
Posts: 86
Loc: Alberta Canada
We use the fifth jaw for digital meters its a piece of #10 connected directly to the neutral.

#7680 - 02/20/02 11:40 AM Re: Fifth terminal
motor-T Offline

Registered: 11/10/01
Posts: 293
Loc: Girard, Ohio, USA
According to my PoCo on single phase its for a 120V pick-up for some meters they use, I didnt pursue whether thay were digital on not could well be.


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals