[Amps] 220 LINES

[Jim Brown]

On Sun,  4 Feb 2007 17:45:45 +0100 (CET), Peter Chadwick wrote:

>Bob said:

>>Neutral never equals Ground.<
>This is true, but it is hopefully, but not necessarily, at ground 
potential, depending on where it is grounded. I measured 24 volts 
with a 500mA availability between neutral and ground at the last 
place I lived. The voltage varied with load on the housing estate 
- the 'ground' was back at the sub-station, and the neutral was 
not grounded at each house. The miracles of Protective Multiple 
Earthing  (PME) as applied in the UK.

Peter,

It is important to realize the difference in neutral bonding in 
the UK between in North America.  In the UK, the bond between 
neutral and ground is done by the power company OUTSIDE the 
customer premises. In North America, the bond between neutral and 
ground is done INSIDE the customer premises where the power enters 
the premises. 

In both cases, Bob's advice is spot on. 

There is a discussion of these differences in a tutorial "white 
paper" I wrote a few years ago.

http://audiosystemsgroup.com/SurgeXPowerGround.pdf

73,

Jim Brown K9YC