Steve wrote:
Hi. I want to extend some (2.5mm2) cable and intend to crimp the
connections (using a proper ratchet tool, before anyone says!). The crimps
will then be buried in plaster.

I'll be using the insulated blue butt crimps but would like to know if extra
protection is needed around them before sloshing wet plaster over them.

You need two layers of insulation - one round the wire (the insulated
crimp takes care of that), and a second overall sheath. If your cable is
not in plastic trunking of some sort then heatshrink tubing is the
easiest way to do it.

http://wiki.diyfaq.org.uk/index.php?...ing#Heatshrink



--
Cheers,

John.

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