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Old 10-16-2013, 03:56 AM   #1
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City: Chicago, IL
Country: USA
Vessel Name: Bay Pelican
Vessel Model: Krogen 42
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Inverter Chassis (Case) Grounding

Several comments on another thread have led me to question the method by which Bay Pelican's inverters are grounded. Both of my inverters have a grounding wire from the metal case of the inverter that is connected to the main engine block.

The instructions for both inverters are similar:

• DC Grounding Connections:
1) The DC grounding conductor (equipment ground) shall be:
a) connected from the metallic case or chassis of the inverter/charger to the engine negative terminal or its bus,
b) of an ampacity equal to that of the DC positive conductor (under certain conditions, there
is an exception to allow this conductor to be one size smaller – refer to the ABYC standard).
2) The inverter/charger’s negative battery terminal and DC grounded conductor (negative
cable) shall not be connected to the inverter case or chassis at the inverter/charger itself.

The important words in the instructions are that the chassis grounding wire is to be connected to the "engine negative terminal or bus".

My question is whether bolting the grounding wire to the engine block meets the requirement.


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Old 10-16-2013, 04:13 AM   #2
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Vessel Model: Benford Fantail 38
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Yes it does but don't create a new ground point use the one that is already there.
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