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9 Ohm L to N- 0.85 amps (157W). What's going on?

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Discuss 9 Ohm L to N- 0.85 amps (157W). What's going on? in the UK Electrical Forum area at ElectriciansForums.net

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p496hav

Hi guys

Just changed a board in a 60s bungalow, and whilst waiting for the customer to find the neon trashing my insulation readings, I checked low ohms live to neutral on an old 6mm radial with 7029 drops, socket circuit. Even in my head I worked out 9 Ohms equated to 23A or about 5Kw- Not possible, his bill would be ginormous.
Next day I plugged it into a power meter and got .85A or 157W. As he'd plugged stuff back in, that was perfectly acceptable, but I was still getting 17 Ohms.
I can't believe the cables are doing it as I'm getting 10meg cpc to L and N, so something is connected, what?
My mate thinks it's inductive or capacitive, and my meter is using dc to measure an ac load, but that's over my head.
Any ideas?
 
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just follow your nose:

[ElectriciansForums.net] 9 Ohm L to N- 0.85 amps (157W). What's going on?
 
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A switch neon
Ignition for a cooker
Fused down radial supplying any number of things like a fan
Anything with a transformer in it
Boiler control or timer

Basically you missed something when isolating all loads its always wise to Insulation test at 250v first when doing L/N to check for missed items as 500v can damage sensitive electronic equipment.
 
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Inductive load, I'd concur. Transformer or motor, most likely. 9 ohms dc resistance as measured by your meter, but 270 ohms impedance at 50 Hz. Not capacitive though, that reads infinity to a dc resistance range.
 
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p496hav said:
Hi guys

Just changed a board in a 60s bungalow, and whilst waiting for the customer to find the neon trashing my insulation readings, I checked low ohms live to neutral on an old 6mm radial with 7029 drops, socket circuit. Even in my head I worked out 9 Ohms equated to 23A or about 5Kw- Not possible, his bill would be ginormous.
Next day I plugged it into a power meter and got .85A or 157W. As he'd plugged stuff back in, that was perfectly acceptable, but I was still getting 17 Ohms.
I can't believe the cables are doing it as I'm getting 10meg cpc to L and N, so something is connected, what?
My mate thinks it's inductive or capacitive, and my meter is using dc to measure an ac load, but that's over my head.
Any ideas?
Click to expand...

Shouldn't you be doing this?
 
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