OK. Pretty much done now.
I cant believe I was going to try and cut the PVC box with a Stanley knife. This stuff is tough and about 3 mm thick which creates another problem that my push fit fittings now won't lock into place. Using the jigsaw took me about an hour and a half to cut the holes to size. Yep. Your eyes aren't crooked. The faces aren't perfectly square but close enough.
I've wired it all up and just need to shrink wrap the terminals to prevent accidental short circuiting and then test it under load. Testing the potentiometer it seems the two legs that are wired up are the wrong ones. Turning the knob doesn't create a change in voltage across the two wired legs however it does if you put one of your multimeter probes on the unwired leg. Go figure? I'll try it under load first before I muck with it.
I thought the box had loads of room but once all the wirings in place that space seems to shrink rapidly. Bit of a squeeze getting the lid closed.
This is a pic of the IEC connectors on the bottom of the box. I guess I'll have to use sikaflex or some other strong glue to hold them in place as the locking clips wont clip onto the wall. Not sure what will stick to the plastic AND pvc. Superglue?? Araldite??
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This is one of the Box opened up with everything in situ before the wiring.
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And here's the spaghetti. Used 4 mm for the load bearing wires and 2 mm (I think) from a 240 volt extension lead offcut for anything with small current draws like the instruments.
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And here's the front with power on the SCR circuit. All the circuits seem to work. Just have some minor tidying and shrink wrapping to do, a quick look over by the sparky, and then testing it all under load.
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One thing that has me stumped is how to wire in the fan without putting power through the other two units that aren't being used (through the fan cable). I want the fan on no matter where the plug gets plugged in but if I wire the two power cables for the fan to all three live and neutrals in parallel then the power will feed the three pins on the feed side making exposed 240 volt live pins. Anybody out there with some electrical knowledge that could help???? The sparky I talked to was stumped as well. :think:
Hopefully it'll be ready to run by Tuesday when I can fire it up for realsies.
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