ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Square D "All-In-One" Panelboard
by NORCAL - 11/30/21 12:48 PM
Where is Everyone?
by luckyshadow - 11/21/21 10:14 AM
It's been an interesting career
by The Watt Doctor - 11/19/21 09:56 AM
Well I am back to stay (nearly 6 years)
by The Watt Doctor - 11/19/21 09:17 AM
Motor Load Relationships Between Fans and Pumps
by The Watt Doctor - 11/18/21 09:24 AM
New in the Gallery:
240/208 to a house
240/208 to a house
by wa2ise, October 9
Now you know.
Now you know.
by Tom_Horne, September 7
Who's Online Now
0 members (), 44 guests, and 20 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Aug 2002
Posts: 1
G
GRex Offline OP
Junior Member
I had some central AC installed in my attic recently, and a short circuit (or some event) occurred when one of the two 240V circuits were switched on. The circuit breaker did not trip; the installer had to manually switch the circuit off to stop the event. The lightbulbs dimmed in the house, my cable TV was fried, and I noticed what turned out to be a leak in my main water pipe under the foundation.

I have a boiler system for heating, and I'm thinking the short circuit leaked current across my boiler pipes and arced over to the water line and poked a hole in it.

I've been told that this is possible, but I'd like to know for sure.

Any ideas?

Thanks.

Joined: Aug 2001
Posts: 7,520
P
Member
Another possibility might be that if the current flowing through the pipework was very high, it could have heated it enough to melt a soldered joint.

Joined: Aug 2002
Posts: 35
S
Member
It sounds to me like you have some grounding issues. Perhaps grounding rods and ther water pipe ground are not bonded together, or no grounding rods at all (older service). The cable blew due to the current flowing through the pipe going to the cable bonding nut and through the cable box (and back down the ground wire probabally).

I would say you have at least 2 problems:

1) High resistance gound (does not allow enough current to flow to trip the breaker.

2) Bonding problems. All grounds are supposed to be bonded together to create an equal potential. Improperly bonded grounds will easily destroy electronic equipment (cable sattilite system, computer networks etc) as they use and link grouns on different points in the electirical system.

SD


SD
It is best for a leader to be both feared and loved. But since this usually cannot be done, it is safer to be feared.

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
AllClear
AllClear
Belmond Iowa US
Posts: 44
Joined: August 2005
Top Posters(30 Days)
Admin 3
dsk 2
Popular Topics(Views)
286,320 Are you busy
218,767 Re: Forum
204,931 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5