I have seen the light (2)
Hi there fraternity.
Just a short extension to my previous post where I attempted to light up my life with some led spots over some of my machines.
This time it was the grinders turn. I use it quite a lot and it’s a good servant so decided to give it a treat. It’s a 3phase 415volt machine with 12-inch wheels, but suffers from a lack of overhead lighting.
I think the photos show the procedures. There was a small taping on the top of the casing that originally supported a small shelf, so bored it out and tapped it to 1/2-inch BSP. this allowed me to screw in a stand pipe directly into the casing. The reason being it would give me the earth route I required. The stand pipe is from a bottom entry we cistern used to accommodate a FOV. Sometimes referred to incorrectly as a ballcock. I also installed the lid of an electrical isolator box to act as a shelf.
I didn’t see the point of fitting two lights so soldered a brass screw into a piece of 15mm copper pipe that would allow the light to swivel either way.
Protected the cable through the hole in the pipe with heat shrink.
Next problem was an electrical supply. Again, same problem as last time, this machine had no neutral, only phase, phase, phase and earth. I wanted the light to come on as the grinder was switched on so. live connected to one of the phases on the switch wire to motor, bringing it on with the motor, and ran in new neutral to the machine.
I know sometimes some people use an earth point if no neutral available, but apart from being against the IEE regs it can cause problems if you have an RCD on your consumer unit (residual current device) which detects leak to earth it can inadvertently trip the device. So, based on that I ran a neutral.
Nice to look at, No.
Last edited by Coleve; 09-18-2018 at 10:23 AM.