Article View: sci.electronics.repair
Article #273Re: Two phases to house - loss of neutral
From: nesesu
Date: Tue, 24 Nov 2009 04:07
Date: Tue, 24 Nov 2009 04:07
33 lines
2532 bytes
2532 bytes
On Nov 23, 6:36 pm, "Phil Allison" <phi...@tpg.com.au> wrote: > "Trevor Wilson" > > > > > **AFAIK, the US system is fundamentally different to ours. > > ** In the US and Canada - it is NOT permitted to link neutral and earth > or plumbing within a premises. > > See here under the heading "Regulations". > > http://en.wikipedia.org/wiki/Earthing_system > > The MEN system used here in Australia seems to be unique. > > See last para on same page. > > ..... Phil Rubbish. In most of Canada, it is manditory that the neutral be bonded to earth at only ONE point, the service entrance switch enclosure. From that point an earth conductor is connected to 2 ground rods and to any metallic piping system(s). Neutral failure is a not uncommon problem especially with overhead aluminum 'triplex' service drops. A seagull deficates on the bare aluminum neutral and it soon rots off leaving an open neutral condition. Ground rod to earth resistances of 5 ohms are not uncommon, so a 10A unbalance between 'phases' could give a 50V offset of the neutral. Neil S.
Technical Details
Message-ID:
<66979758-2a22-4a09-b7b3-701ffcfa14b0@e4g2000prn.googlegroups.com>Path:
arc1-ca.pugleaf.net!g2news1.google.com!postnews.google.com!e4g2000prn.googlegroups.com!not-for-mailReferences:
<0083b31e$0$1587$c3e8da3@news.astraweb.com> <7n0tv4F3k3aq7U4@mid.individual.net> <00697e42$0$8185$c3e8da3@news.astraweb.com> <7n0ubbF3k8kq2U4@mid.individual.net> <7n0v5uF3j8n3cU1@mid.individual.net>Show Full Headers
Complete Article Headers
X-Google-Thread: a5a6238865,dcb8eebd9233b785 X-Google-Attributes: gida5a6238865,public,usenet X-Google-NewGroupId: yes X-Google-Language: ENGLISH,ASCII Path: arc1-ca.pugleaf.net!g2news1.google.com!postnews.google.com!e4g2000prn.googlegroups.com!not-for-mail From: nesesu <neil_sutcliffe@telus.net> Newsgroups: sci.electronics.repair,aus.electronics Subject: Re: Two phases to house - loss of neutral Date: Mon, 23 Nov 2009 20:07:44 -0800 (PST) Organization: http://groups.google.com Lines: 33 Message-ID: <66979758-2a22-4a09-b7b3-701ffcfa14b0@e4g2000prn.googlegroups.com> References: <0083b31e$0$1587$c3e8da3@news.astraweb.com> <7n0tv4F3k3aq7U4@mid.individual.net> <00697e42$0$8185$c3e8da3@news.astraweb.com> <7n0ubbF3k8kq2U4@mid.individual.net> <7n0v5uF3j8n3cU1@mid.individual.net> NNTP-Posting-Host: 216.232.178.116 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: posting.google.com 1259035664 7882 127.0.0.1 (24 Nov 2009 04:07:44 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Tue, 24 Nov 2009 04:07:44 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: e4g2000prn.googlegroups.com; posting-host=216.232.178.116; posting-account=bu8fZAoAAAAFrh3QX0hwsUyXJtD7-Osm User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.1.4322),gzip(gfe),gzip(gfe)