Yesterday's Tractor Co. Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
Classified Ads
Photo Ads
Tractor Parts

Discussion Forums
Project Journals
Tractor Town
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs

Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Classic Trucks
Kountry Life
Tool Talk Discussion Forum

Re: 3 phase grounding

[Show Entire Topic]  

Welcome Guest, Log in or Register
Author  [Modern View]
John T

01-07-2014 16:39:22

Report to Moderator

I agree with my electrician buddy the good Dusty man (I think). Its a bit hard to tell from the picture, but it looks like the Equipment GroundING Conductor (the bare No 4 copper) is bonded to the metal case/frame of the disconnect, while the Neutral is on an insulated black plastic block, therefore NOT bonded to the metallic case and subsequently also NOT bonded to the Equipment GroundING Conductor. HOWEVER if that black plastic block does indeed have the Neutral to the case frame disregard the prior sentence, I JUST CANT TELL FROM THE PICTURE.

That being said and that I cant tell whats what from the picture, HERES WHAT NEEDS TO BE DONE::::

The Neutral Grounded Conductor needs to be attached to a GroundING Electrode Conductor (like No 4 bare copper wire) that leads to a GroundING Electrode such as a driven rod or rods subject to local authority requirements. TO DO THAT ITS LIKE DUSTY SAID I think, install a jumper so as to wire that No 4 bare copper also to the Neutral, that way the Neutral is bonded to the grounding Electrode Conductor which leads to a GroundING Electrode (driven rod or rods).

In addition, the conductive metal case/frame of the disconnect (just like conductive non current carrying metal boxes like junction boxes etc) needs to be attached to the Equipment GroundING Conductor/Buss. If a jumper is ran from the small terminal up to the Neutral (what I think Dusty meant??) that will accomplish all the above: The Neutral will then be bonded to the Equipment GroundING Conductor (No 4 bare copper) which leads to an Equipment Grounding Electrode (driven rod or rods) and also the metallic case/frame of the disconnect is grounded yayyyyyyyyyyyyyyy

I (nor anyone here) can speak for local authority, but if they drove a ground rod and to it that No 4 bare copper wire (GroundING Electrode Conductor) is attached, Id say that will suffice for a proper GroundING Electrode. IE no more GroundING Electrodes are required.

Now that you have single point grounding at the first means of disconnection, from that points I agree I would run 5 wires, 3 Hots, Neutral GrounDED Conductor, and an Equipment GroundING Conductor.

NOTE AND CAVEAT: Is the service 208Y 120 Volt Three Phase Four Wire????????? Or 120/240 Volt Three Phase Four Wire Center Tapped (Red Leg) Delta??????????? THAT MAKES A BIG DIFFERENCE. If its a center tapped red leg delta, its 120 from 2 legs to neutral but 208 from the red/high leg to neutral

NOTE Perhaps that center red taped leg is the red/high leg????????????? IF SO BE CAREFUL and remember that's 208 to Neutral while its 120 from either of the other legs to Neutral !!!!!!!!!!!!!!

Sorry I cant tell from the picture whats what so this may all be wrong as rain NO WARRANTY

DISCLAIMER, This is merely an opinion, and like any opinions here, regardless if it agrees with mine or not, may be right and it may be wrong, Im NOT saying one way or the other, take it or leave it.

John T (suspect its a red/high leg delta so be aware and careful)

[Log in to Reply]   [No Email]
[Show Entire Topic]     [Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:

Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a company you can trust and have generous return policies. Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ About Us ]

Home  |  Forums

Copyright © 1997-2018 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters