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
Son of Sparky
by HotLine1
Yesterday at 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
230 or 345 kV transmission lines?
by annemarie1
10/12/16 01:23 PM
Is this a fix or just a bandaid?
by gfretwell
10/10/16 06:49 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 11
HotLine1 6
renosteinke 6
ghost307 5
sparky 4
Who's Online
1 registered (hyetal), 262 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#102664 - 07/18/06 10:47 AM Meter heights and Masts
dougwells Offline


Registered: 05/03/03
Posts: 1226
Loc: kamloops BC Canada
Just wondering what others think.
When doing service upgrades i will run across where theres not enough height on the wall to mount the meter at the prescribe height and have enough area to support the mast.

the first pic raised an eye brow as my inspector told me there should be 4 ft of mast between the top of meter and the highest support bracket.

this 2nd pic is one i did to compensate for the lost height. of course this pic is much more work to accomplish

[This message has been edited by dougwells (edited 07-18-2006).]

2014 / 2011 NEC & Related Books and Study Guides
#102665 - 07/18/06 09:09 PM Re: Meter heights and Masts
twh Offline

Registered: 03/11/04
Posts: 895
Loc: Regina, Sask.
I'm not familiar with this "4 foot rule." I'm interested in where it comes from.

Appendix B, 6-112(4)(c) is a rule about the projection above the roof.

#102666 - 07/18/06 09:14 PM Re: Meter heights and Masts
dougwells Offline


Registered: 05/03/03
Posts: 1226
Loc: kamloops BC Canada
I think its an BC Hydro (POCO) requirement

#102667 - 07/21/06 09:44 PM Re: Meter heights and Masts
jay8 Offline

Registered: 07/28/05
Posts: 183
Loc: Vancouver, BC
4 feet of mast between the top of the meter and the highest support?? that means you have four feet to install the three required supports on the wall for the mast. That seems a little odd as a rule, I could see some installs where you had no choice, but imagine if you had 10 feet above the meter until you hit the soffit, all your brackets are grouped in the lower 4 feet. I would Checdouble check that rule again.

#102668 - 07/22/06 09:33 AM Re: Meter heights and Masts
dougwells Offline


Registered: 05/03/03
Posts: 1226
Loc: kamloops BC Canada
then we extend the mast with EMT and change the meter hub to a threaded one
Theres an Adapter to transition from the mast to EMT also.

#102669 - 07/26/06 09:56 AM Re: Meter heights and Masts
mikesh Offline

Registered: 06/07/06
Posts: 614
Loc: Victoria, BC, Canada
From appedix B 6-112 the mast definitions only state that there must be at least 3 supports. 1 at the roof line and 2 on the wall and capeable of supporting a 270 kg cantelever load. The maximim unguyed length above the roof is 1.5 meters. If the mast can support the side load with less than 4 feet below the roof then I think it is OK but maybe the mast cannot normally support such a load with such a large cantelever above the roof and the 4 foot thing arises from that.

#102670 - 07/26/06 09:56 PM Re: Meter heights and Masts
u2slow Offline

Registered: 09/18/03
Posts: 198
Loc: Salt Spring, BC, Canada
My inpsector pointed out I am lucky to have an intermediate pole at my property line (30' away). Otherwise the cantilever load of the triplex crossing my front street would be too great for the height of my mast. (Green garage door is only about 6'6" high).

[This message has been edited by u2slow (edited 07-27-2006).]


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