Extend stranded wires in tight area...

[unclebob1]

Afternoon All,

I have a PIR which has very short cable runs going into a sealed pir. (it came off a flood light+pir unit).

I'm only using the PIR, however when i mount the unit i have very little space to make connections, let alone put a screw type terminal block on it.

What would be the best way to extend the wires to give me enough slack to wire properly? I have all the space in the world to connect the wires while it isn't mounted - but the connector (or all the connectors) will need to fit though a 1/2" hole.

Will be using stranded wire to stranded fixed to PIR.

will be a proper junction box where switch and mains will connect.

 

[bernardgreen]

You can make a slim line joint using boot lace ferrules to join the conductors and then sleeve the ferrules with heat shrink.

Put the short tail from the PIR into one end of the ferrule and the extension wire into the other end then crimp using a ratchet crimp tool.

Sleeve each ferrule with heat shrink and then add an overall sheath of heat shrink.

If you are lucky you may find a local company that will do this for a few coins and thus save the cost of buying the tool and a pack of 100 crimps when you only need three or four.

 

[plugwash]

Personally I'd use solder and heatshrink.

 

[unclebob1]

Can i use these? (not from maplin but using it as an example!) and then heatshrink?

http://www.maplin.co.uk/p/maplin-insulated-crimp-terminal-butt-splice-yellow-ml87u

or are the boot lace ferrules better?

Was thinking maybe to solder, then use the crimp above to hold the wires again followed by the heat shrink to stop any ingress of fingers?