ECM Buyers' Guide
  

Code Q&A

Nov 18, 2005 4:05 PM, By Mike Holt

Q. Electricians in our area ground the metal conduit that runs up a utility pole to a local ground rod. Is this a Code compliant installation?

A. The NEC requires all metal raceways that contain service conductors to be grounded [250.80]. However, grounding a metal raceway to a ground rod serves no purpose in removing or reducing dangerous voltage on metal parts from a ground fault.

What is required is that all metal raceways and enclosures containing service conductors be bonded to an effective ground-fault current path in accordance with 250.4(A)(5). This can be accomplished by the installation of an equipment bonding jumper, of any length, from the top of the metal pipe to the utility secondary neutral terminal in accordance with 250.102(E).




































Want to use this article? Click here for options!



Acceptable Use Policy
blog comments powered by Disqus

what's wrong here?

What's Wrong Here?

Oct 22, 2009 11:16 PM

What's Wrong Here?

Oct 8, 2009 3:32 PM

What's Wrong Here?

Sep 24, 2009 1:13 PM

View all What's Wrong Here?

product of the week

LED light engine

November 2, 2009

LED light engine

View all 2009 Products of the Week

Recent Comments

More...


EC&M TV

Exterior Fixture Box for Brick or Stone

Installing a fixture box in a brick or stone wall just got easier with Arlington’s new adjustable depth box!

Southwire's 2009 Cable Innovation Road Show

Gain years worth of insight in only 2-1/2 hours with Southwire’s 2009 Cable Innovation Road Show with Grounding Seminar. The agenda is packed with valuable information that focuses on installation tips!

Listen
Sizing Gen-Sets: Facts, Hints, and Good Judgment
Listen

The complexities of today’s commercial or industrial facility, with their equipment environment of linear and nonlinear loads, places a whole new light on sizing engine-generator sets.

Arc Mitigation - A Total System Approach
There’s no question the risk of arc flash hazards is real in the electrical industry. What many don’t always realize is the impact in business interruption from such events typically far outweighs the physical damage to equipment. View this On Demand Webinar!

Implementing an Industrial Ethernet Infrastructure that's Built to Last
This webinar explores the key benefits of implementing a robust complete, end-to-end Industrial Ethernet solution – from cabling and connectivity, to active components and associated hardware. View this On Demand Webinar!

resources

product info icon

product info

tradeshow icon

tradeshow

research icon

research

rss icon

rss

Browse Back Issues

Browse Back Issues