Fwom:BigWallop )

Laptops are the only PC's I've seen that don't have an earth
conductor from
their separate power supplies. Anything in a metal casing, without
double
insulated skins over the hot spots, needs an earth wire. It's da
rools, man.

It is da roolz, but they arent enforced or applied. Open up any metal
cased Japanese stereo, and 9 times out of 10 you'll find theyre single
inulsated and unearthed.

NT

In article ,
N. Thornton wrote:
It is da roolz, but they arent enforced or applied. Open up any metal
cased Japanese stereo, and 9 times out of 10 you'll find theyre single
inulsated and unearthed.

Which makes? Repaired an NAD recently, and they'd gone to fair old lengths
to make it safe with the top cover removed.

Lots of older Jap gear did have an earth for the UK - and suffered from
earth loops because of them.

--
*We are born naked, wet, and hungry. Then things get worse.

Dave Plowman London SW
To e-mail, change noise into sound.

N. Thornton wrote:
Open up any metal
cased Japanese stereo, and 9 times out of 10 you'll find theyre single
inulsated and unearthed.

Metal cased VCRs get their double insulation from the PSU and are
unearthed. I can't see why PCs should be any different with a similar
construction.

Regards
Capitol

N. Thornton wrote:

It is da roolz, but they arent enforced or applied. Open up any metal
cased Japanese stereo, and 9 times out of 10 you'll find theyre single
inulsated and unearthed.

That's rubbish, Sir.

"The rules" here means the EU 'low-voltage directive', implemented in
the UK in the form of the Electrical Equipment (Safety) Regulations
1994. These are most certainly applied and enforced. The relevant
product safety standard for the equipment you mention is BS EN 60065
(aka BS 415).

On Class 2 (non-earthed) equipment you should find both the CE mark and
the 'double-square' symbol, which indicates Class 2 construction. Class
2 does not necessarily require double insulation; reinforced insulation
will also meet the requirements of the standard.

--
Andy

N. Thornton wrote:
Fwom:BigWallop )


Laptops are the only PC's I've seen that don't have an earth

conductor from

their separate power supplies. Anything in a metal casing, without

double

insulated skins over the hot spots, needs an earth wire. It's da

rools, man.

It is da roolz, but they arent enforced or applied. Open up any metal
cased Japanese stereo, and 9 times out of 10 you'll find theyre single
inulsated and unearthed.

NT

Don't froget that an air gap is acceptable as basic insulation, with
certain constraints as to clearance and creapage distances.