7 Jun
2010
7 Jun
'10
2:58 p.m.
On 07/06/10 21:07, Tony Duell wrote:
You were actually taught something useful at school? I
am amazed...
Me too. We never got taught anything like that in science or physics (or
any class for that matter). Though a few of the PTA members and a
certain headteacher were very vocal about their dislike of "dangerous"
subjects...
Hmm.. Actualyl stripping the cable tends to be the
hardest part ot do
right. It's very easy to 'nick' the insulation on the inner wires when
cutting off the outer sheath.
It's a bitch doing it with co-ax too. I usually end up using a
retractable-blade Stanley knife to cut about half-way through the
insulation, then bend/twist it around the cut mark and it breaks apart
fairly easily. Then bend 180 degrees all four ways to make sure you
haven't nicked any of the internal wires.
The next trick you'd miss if you have pre-stripped
cable is the correct
length of the wires. The earth wire shold hace the most slack, so if the
cable clamp fials and the cable is pulled out of the plug, the earth
breaks last.
Easiest way to deal with that is to take off about 2.5" to 3" of outer
insulation, put the wire on top of the cable clamp, then cut the wires
back appropriately.
To check if the lengths are correct -- put the wires into the
screwpoints but don't tighten the screws. Pull on the wire and see what
the "order of detachment" is.
"Simples!"
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/