[RE-wrenches] System bond through DC GFP

[Kent Osterberg]

Generally a system bonding conductor must be as large as the GEC, 8 AWG 
minimum.  Inverter manufacturer's often have a smaller conductor make 
the system bond through the inverter's GFP.  For factory assembled and 
listed products, the small conductor is obviously accepted by a 
testing/listing lab.  The MidNite and Outback GFPs are often field 
installed and they come pre-wired with 14 AWG.  Obviously this is large 
enough if the GFP trips at 1/2-amp or 1-amp.  Seems to me that the Code 
section that requires a DC GFP should address the system bonding 
conductor size.