WTF has this to do with a shock? I never said use the earth as a live.
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11 years ago
Electrical socket from light switch for cctv.
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11 years ago
Earth and neutral are both zero volts, it works just fine.
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11 years ago
I've got fuses for everything except lighting. Less nuisance trips.
I have circuit breakers on the lighting to protect the PIR lighting system I put in my house which is a bit fragile to shorting if a bulb fails the wrong way.
I have no RCD. They don't protect me against fire, so I don't need them.
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11 years ago
It's OK as long as people don't try it!
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11 years ago
And as you a sandwich short of a picnic then we can ignore anything that you say.
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11 years ago
Are you sure that they are always both zero volts?
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11 years ago
Says the guy without a response.
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11 years ago
Near enough. I've never seen the difference be higher than a volt.
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11 years ago
Earth & neutral are normally zero volts.
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11 years ago
Until you get a circuit with a disconnected earth somewhere, then everything metal in scotty's house is live because some clueless retard decided it was ok to use the earth as a neutral.
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11 years ago
Never heard of voltage drop in a circuit?
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11 years ago
In message , bert writes
Earth and neutral are normally connected at the local substation
but
RULE No 1
You always measure live wrt neutral NOT to earth
RULE No 2
see rule No 1
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11 years ago
Bullshit. I'm not connecting LIVE to the earth, I'm connecting NEUTRAL to it.
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11 years ago
Yes always subtract zero and not zero. [shakes head]
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11 years ago
I've seen it used in the past year for a new installation of street lighting, Single red core, spiral armour for combined neutral / earth, probably still got a short offcut somewhere that I picked up.
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11 years ago
no knobstick, if you are placing a load between live and earth then you are connecting live to earth.
Think how much current flows through the circuit when you disconnect the earth - its a nice round number. Now apply ohms law to work out the voltage drop across the load with zero current flowing through it. Finally take that away from your mains supply voltage and you have the voltage on your (previously) earthed metalwork.
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11 years ago
Curious, fuses are far more tolerant of bulb failure than MCBs.
And the reasoning behind that is?
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11 years ago
[snip]
That he is a troll and an idiot.
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11 years ago
With f*ck all current capabilities. We were talking about small loads remember.
That CRT over there has got millions of volts of static on it but for some reason it doesn't kill me when I touch it....
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11 years ago
Exactly. When an incandescent blows in a shorted state (GU10 spots like to do this), the MCB trips quicker than the fuse. With the fuse, it's the PIR device that breaks first. And they cost more than an MCB.
Because I'm not a pansy afraid of a shock.