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Topic Title: EN60204-1 Clause 18.2.2 Expected range of protective bonding circuit impedance
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Created On: 30 March 2012 02:19 PM
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 30 March 2012 02:19 PM
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Avatar for dougflorence                                      .
dougflorence

Posts: 74
Joined: 25 July 2008

EN60204-1 18.2.2 says "......The resistance
measured shall be in the expected range according to the length, the cross sectional area
and the material of the related protective bonding conductor(s)....."

Easy enough to a calculate the theoretical conductor resistance, although on an old machine it can be a bit difficult to decide what the conductor size is.

The standard does not mention connection impedance but that can be a significant part of the overall protective bonding circuit impedance and can often be more of a problem than undersized conductors.

Is there any guidance about what could be considered a reasonable range for connection resistance?
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