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What is an RCD?
Mike
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Are you using a RCD? Hi - Im getting my PCNC up and running now - very impressed.
Tormach advise using a RCD on the supply - for safety I suppose - so I fitted one. It is A 10Amp 2400 w 250V. But the current draw on motor start up is popping it out. i could probably get a bigger one but.....
I wonder if this is just Tormach being cautious - and how many users are really using them?
Like to hear your thoughts.
What is an RCD?
Mike
Residual Current Device - detects current leak to earth, shuts down power supply and can prevent electric shocks etc.
I take it you have a combo breaker, meaning it will trip on overload or earth leakage, you can get them with a higher overcurrent trip (20amps) and still have a 30milliamp leakage trip, this should solve your motor tripping problems.
We have to have RCD's on all power/light circuits here so I guess we are already covered
Cheers.
Russell.
In the US that is a GFI.
Its a type of combo breaker - but only surge and RCD - maybe the surge is tripping? anyway I have left it off for now - I suspect most of you run without one? Cheers
Dear keen,
RCD, ELCB, GFI or whatever... use one
The last thing you need when operating a machine or power tool (whether it is indoors or out) is a shock that puts your muscles into spasm. If you are lucky, you just get a spasm. The other end of the luck spectrum is instant death, and death, also, to the person who comes to rescue you.
The devices are mighty cheap compared to your life.
Sorry, please excuse the lecture...
Best wishes,
Martin
Good general advice Martin - thanks. I have checked the machine to actual earth and it is good - I would have to grab a live wire to be the preferred earth
But..........actually I had a bad hair day once and did virtually that.........hmmm..........
Dear keen,Originally Posted by keen
One might cost you about £ UK 30 tops (sorry I do not have the NZ currency rate to hand).
30 mA trip
30 milliseconds
Get one now.. or value your life (and those close to you) quite cheaply.
(end of lecture)
Best wishes
Martin
I have several machines with coolant in operation - presumably the risk is about equal on all - do you mean a RCD on each machine or just one on the main board? In NZ RCD on each machine or on main board is very rare.
Cheers
Dear keen,
I'm really no expert on this, but I have a single RCD on the incoming supply, both at work and at home. My belief is that this gives reasonable protection to all devices "downstream" on each site. I could well be wrong.
It could be that if you have a remote shed some way from your house, you may need another means of protection. Eg. another earth electrode rod banged into the ground next to the shed, and maybe another RCD.
I speak from ignorance here, and there will be plenty of people on the Zone who will be of help.
Bring it on Guys..
Best wishes,
Martin
Of course, if you want to risk it...
BW
Martin
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