Europa Plus Earth Bond Resistance Calculator

PATGuard 3 Forum

Europa Plus Earth Bond Resistance Calculator

Postby kryten » Tue May 01, 2012 2:52 pm

Does anyone know why the values generated by the built-in Earth Bond Resistance Calculator on the Europa Plus are so much larger than the nominal resistance of the conductors as taken from widely published tables?
For example:
1mm CSA (10A) 3M nominal resistance 0.0585 Ohms - Seward Calc 0.16 Ohms
1mm CSA (10A) 6M nominal resistance 0.1170 Ohms - Seward Calc 0.22 Ohms
1mm CSA (10A) 12M nominal resistance 0.2340 Ohms - Seward Calc 0.34 Ohms

I know there needs to be a margin added for contact resistance in the plugs, but isn't ths going a bit far?
kryten
 
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Joined: Tue May 01, 2012 2:34 pm

Re: Europa Plus Earth Bond Resistance Calculator

Postby safe + sound » Tue May 01, 2012 4:14 pm

Hi kryten

This is because the Code of Practice states the pass level for supply cords, cord sets and extension leads is (0.1 + R) where R is the resistance of the protective conductor, ie. the nominal resistance you refer to.
safe + sound
 
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Joined: Wed Feb 09, 2011 6:43 pm

Re: Europa Plus Earth Bond Resistance Calculator

Postby kryten » Tue May 01, 2012 5:40 pm

Thanks safe + sound, it makes sense now! :D
kryten
 
Posts: 15
Joined: Tue May 01, 2012 2:34 pm


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