Induced voltage on Heating element body

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fences

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Hello,
I have a 220v (AC) heating element. like this :
**broken link removed**

it's work fine and resistace between of terninam and metal body is over 100 mega ohm.
**broken link removed**

but when i turn on the circuit, it's body has ac voltage. i think it is an induced voltage. is it true?
my circuit has no ground.
**broken link removed**


is there any idea for remove this voltage? ( without ground or earth wire ).
 

fences said:
is there any idea for remove this voltage? ( without ground or earth wire ).
Click to expand...
No. If you don't ground the body, there will be a voltage on it.

btw, I can't see any of your attachments.
 

Instead of measuring body "voltage" (I guess with a 10 Mohm multimeter or so), you better measure leakage current.

Two points that should be considered

- Isolation resistance is decreasing with temperature
- Even if the leakage current is quite low, e.g. < 100 µA, the insulation isn't necessary qualified for operation without protective earth connection
 
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    fences

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thanks, is there any standard ( like iso series ) documents for this?
 

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