Induced voltage on Heating element body

[fences]

Hello,
I have a 220v (AC) heating element. like this :
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it's work fine and resistace between of terninam and metal body is over 100 mega ohm.
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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 ).

 

[godfreyl]

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

No. If you don't ground the body, there will be a voltage on it.

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

 

[FvM]

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

 

[fences]

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