Canuck Audio Mart Hifi and Audio ForumCanuck Audio Mart Hifi and Audio Forum
It is currently Fri Oct 20, 2017 8:37 pm

All times are UTC - 8 hours




Post new topic Reply to topic  [ 48 posts ]  Go to page 1, 2, 3, 4  Next
Author Message
PostPosted: Mon Jul 04, 2005 4:39 pm 
Offline

Joined: Fri Mar 04, 2005 4:20 pm
Posts: 231
Location: Richmond, BC, CA
Hello,
When I changed the outlet in my apartment (an old building), I discovered the outlet has only live and neutral, no ground connection. As there is metal box surrounding it, I installed a connection between the outlet ground and the metal box. Ok, everything done, system reconnected and turned on, system sounds fine, a bit better than before since I used a higher quality outlet. Some ppl wrote to magazines saying they could hear the radio station thru the speakers even the amp is turned off, since the metal tube pipeline in the building acts as a giant antenna. But I didn't hear such artifacts. Am I doing the right thing? What are the requirements of electrical grounding in a building or house?

Any help appreciated,
Will.


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Mon Jul 04, 2005 7:49 pm 
Offline

Joined: Mon Dec 13, 2004 12:10 pm
Posts: 355
Location: Toronto, ON, CA
It is probably best to consult the Ontario Electrical Code for such requirements.....What you have experienced is older 2 conductor wiring which has not been upgraded however a 3-prong receptacle has been put in to replace all the outlets.....As far as a ground is concerned I believe it must be made through at least an 8-guage copper condutor to a cold water pipe just above where it enters the ground in basement or install a 10 foot copper grounding rod...A job for the electrician....


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Mon Jul 04, 2005 8:17 pm 
Offline
User avatar

Joined: Sun Apr 17, 2005 12:46 pm
Posts: 1598
Location: Fort St. John, BC, CA
Good advice - talk to your electrician to upgrade. The code changes quite frequently, and can be quite outdated after two years. Also, the language is sometimes without any knowledge not easy to understand. Believe me, I studied the code as it applies to low voltage (< 110V)


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Mon Jul 04, 2005 8:25 pm 
Offline

Joined: Mon Dec 13, 2004 12:10 pm
Posts: 355
Location: Toronto, ON, CA
Should have said consult the BC Electrical Code...


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Jul 05, 2005 3:26 am 
Offline

Joined: Fri Jan 21, 2005 7:43 am
Posts: 1121
Location: East York, ON, CA
Our house is all 2 prong, and no metal conduit on the wiring either, so no luck grounding to that.

The only thing I worry about is that surge supressors won't work because they direct surges to the ground.

Did you check the outlet after you wired it? If not, get one of those testers at Canadian Tire with the LEDs. You may be surprised. If you grounded to the box, the building wiring is in a metal conduit, the box is attached to the conduit, and the conduit is grounded at the other end, you may have a ground!

And next time, get an electrician to do the work :D


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Jul 05, 2005 4:58 am 
Offline

Joined: Fri Jul 01, 2005 1:56 pm
Posts: 1097
Location: near PETERBOROUGH, ON, CA
I am definitley NOT an expert,,,,but I think you may be violating the electric code by grounding the outlet the way you have. I believe the only acceptable method is to a 3 conductor cable.


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Jul 05, 2005 6:37 am 
Offline

Joined: Fri Nov 26, 2004 12:51 am
Posts: 472
I would gestimate the wiring is atleast 45 years old or more.The only way to ground it properly is to run a ground wire adjacent to the wire feeding the outlet back to the fuse panel and connect it to the ground bus.I believe this is the only acceptable legal way of doing it.It's probably easier just to pull the old wire and replace it with new stuff.That in itself can be a nightmare if the old wire breaks while pulling the new.
Sorry I missed the part about all your outlets being grounded in a metal conduit.If this is the case you do indeed have ground as long as the metal conduit itself is grounded at some point.


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Jul 05, 2005 12:05 pm 
Offline

Joined: Mon Dec 13, 2004 12:10 pm
Posts: 355
Location: Toronto, ON, CA
"Sorry I missed the part about all your outlets being grounded in a metal conduit.If this is the case you do indeed have ground as long as the metal conduit itself is grounded at some point"

Yes you MAY have a ground but not one that meets electrical code...For instance should you have a ground fault problem you will energize whatever metal is connected to the box creating a potentially dangerous situation..in other words someone could get hurt...or worse...The only acceptable ground is one made through a proper size conductor to the ground bus at the panel or to a cold water pipe or a ground rod...and yes do have an electrician do the work...[/quote]


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Jul 05, 2005 1:01 pm 
Offline
User avatar

Joined: Fri Jun 17, 2005 6:59 pm
Posts: 3284
Location: GVRD, BC, CA
Read this, become a genius.

http://www.aes.org/sections/pnw/pnwrecaps/2005/whitlock/whitlock_pnw05.pdf

_________________
Always keep an edge on your knife, son
Always keep an edge on your knife
Cuz a good sharp edge
Is a man's best hedge
Against the vague uncertainies of life
Corb Lund


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Jul 05, 2005 2:33 pm 
Offline

Joined: Fri Jan 21, 2005 7:43 am
Posts: 1121
Location: East York, ON, CA
Yaukui wrote:


That is a great document. I feel smarter already :D


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Jul 05, 2005 2:56 pm 
Offline

Joined: Sun Mar 06, 2005 9:54 am
Posts: 257
Location: Calgary, AB, CA
Yaukui wrote:



I second that "Great Document" but when do the smarts kick in ?


Louballoo


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Jul 05, 2005 4:59 pm 
Offline
User avatar

Joined: Sun Apr 17, 2005 12:46 pm
Posts: 1598
Location: Fort St. John, BC, CA
Quote:
I second that "Great Document" but when do the smarts kick in


If after reading this document you accidentally should connect your finger to the "hot" in your wall outlet.


Last edited by kraut on Tue Jul 05, 2005 7:28 pm, edited 1 time in total.

Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Jul 05, 2005 6:25 pm 
Offline
User avatar

Joined: Tue May 25, 2004 6:54 pm
Posts: 84
Location: Hamilton, ON, CA
Shouldn't the OP resort to usin GFI recepticals? That way if something does go wrong the socket will trip.


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Wed Jul 06, 2005 5:10 am 
Offline

Joined: Fri Nov 26, 2004 12:51 am
Posts: 472
Good read


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Mon Jul 11, 2005 7:42 am 
Offline
User avatar

Joined: Fri Feb 18, 2005 12:41 pm
Posts: 1468
Location: bowmanville, ON, CA
sure is a good read. Put a sticky on it for everyone to read up on.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 48 posts ]  Go to page 1, 2, 3, 4  Next

All times are UTC - 8 hours


Who is online

Users browsing this forum: No registered users and 9 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group