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#160776 - 03/25/07 06:38 PM Service mast  
Sparks30  Offline
Member
Joined: Mar 2002
Posts: 125
Connecticut.usa
This will be the first rigid service mast job on a house. I know you have to tie the mast off to the houde. My question is how. The utility company says nothing but the guide wire to be tie to mast. I was thinking of using a clevis and 1/8 wire to a eye bolt through the roof. Does this sound right. Thanks.


Work Gear for Electricians and the Trades

#160781 - 03/25/07 08:06 PM Re: Service mast [Re: Sparks30]  
jdo1942  Offline
Junior Member
Joined: Nov 2005
Posts: 31
st. louis, mo. usa
We use a piece of 1/2" emt with the ends flattened and a minnie to attach to the mast. This is easy and you generally have the materials


#160782 - 03/25/07 08:11 PM Re: Service mast [Re: jdo1942]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,858
Brick, NJ USA
PSE&G specs (NJ) are: 1/4" Galv wire and a 30 degree min. angle; "securely fastened to anchored studing". Also, RGC mast must be attached to structure (house) with 1/2" machine through bolts thru wall studs. min of 2 straps, each 1000lbs horiz pull. Minimum conduit 2" max 3".

From PSE&G Green Book, 2005 Edition. I have heard rumors that they now want 2-1/2" RGC as a min.

John


John

#160787 - 03/25/07 09:00 PM Re: Service mast [Re: HotLine1]  
LK  Offline
Member
Joined: Jan 2003
Posts: 1,429
New Jersey
"I have heard rumors that they now want 2-1/2" RGC as a min."

Just did one, and yes for PSE&G 2-1/2" Rigid.


#160788 - 03/25/07 09:03 PM Re: Service mast [Re: LK]  
frenchelectrican  Offline
Member
Joined: Feb 2003
Posts: 939
Wi/ Paris France { France for ...
right now my POCO is still using 2 inch rigid but i heard the rumors as well eek

the cost for 2.5 rigid genrally more but i think some poco get smart with this because some area did actally used Al rigid but our speced say steel rigid

Merci , Marc


Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)


#160793 - 03/25/07 09:21 PM Re: Service mast [Re: frenchelectrican]  
Joey D  Offline
Member
Joined: Oct 2003
Posts: 259
Arlington MA U.S.
N star requires 2 1/2 ridged in MA. I did one 3 months ago.


#160795 - 03/25/07 09:45 PM Re: Service mast [Re: HotLine1]  
ShockMe77  Offline
Member
Joined: Jun 2005
Posts: 821
Rahway, New Jersey
Originally Posted by HotLine1
PSE&G specs (NJ) are: 1/4" Galv wire and a 30 degree min. angle; "securely fastened to anchored studing". Also, RGC mast must be attached to structure (house) with 1/2" machine through bolts thru wall studs. min of 2 straps, each 1000lbs horiz pull. Minimum conduit 2" max 3".

From PSE&G Green Book, 2005 Edition. I have heard rumors that they now want 2-1/2" RGC as a min.

John



John, I did a service not too long ago that the other "mechanic" claimed "didn't need no stinking guy wire." He also only used (1) 2" thinwall strap! Thinwall! Machine screw bolts? LOL! Sheetrock screws! He was a know it all so who was I to tell him otherwise? Amazingly, it passed inspection. I wired the panel and did the grounding.


#160798 - 03/25/07 11:26 PM Re: Service mast [Re: Sparks30]  
e57  Offline
Member
Joined: May 2003
Posts: 2,876
S.F.,CA USA
They (manufacturers like b-line ect) make a 'mast kit' if over a roof. It consists of some 1/2" or 3/4" RMC fittings and rings that go on the conduit, and some brackets to bolt to the roof. You get to thread your own RMC for it. But this is identified in the instuctions for the purpose.

Quote
230.28 Service Masts as Supports.
Where a service mast is used for the support of service-drop conductors, it shall be of adequate strength or be supported by braces or guys to withstand safely the strain imposed by the service drop. Where raceway-type service masts are used, all raceway fittings shall be identified for use with service masts. Only power service-drop conductors shall be permitted to be attached to a service mast.


Mark Heller
"Well - I oughta....." -Jackie Gleason

#160800 - 03/26/07 12:05 AM Re: Service mast [Re: e57]  
BigB  Offline
Member
Joined: Mar 2004
Posts: 719
Tucson, AZ USA
Yes it uses 3/4" fittings and we are required to use them where I am. The Ahj said no more flattened emt allowed. So another thirty dollars for the pipe and mast kit and another forty minutes measuring, cutting and threading IMC the price of an upgrade just went up another hundred dollars.


#160802 - 03/26/07 02:04 AM Re: Service mast [Re: Sparks30]  
e57  Offline
Member
Joined: May 2003
Posts: 2,876
S.F.,CA USA
Quick side questions here: Are these places that are requiring 2"+ RMC to be installed so 'they' (the POCO) pulls the conductors? Or are you also pulling the conductors? Do these places also have min. 200a services too?


Mark Heller
"Well - I oughta....." -Jackie Gleason

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