Forum Discussion
BFL13
Jan 27, 2015Explorer II
Repeat from earlier post--the 120v cord going into the converter chassis box has its ground wire going to the back of that "chassis ground" lug inside the box. The lug has another lug on the back of it for inside. (It is the same with inverters only in reverse)
So the main 30a shore power cord comes in and its big bare copper wire is grounded to the frame, the hot goes to the 30a main breaker, and the neutral goes to the N bus.
The receptacle circuit the converter plugs into is three prong with the ground prong to the frame using that same big copper wire back at the AC breaker panel. Now you run a wire from the chassis ground lug to the frame.
A built-in "lower portion" converter is not grounded like a deck mount because its chassis is touching the big power centre chassis which is grounded. The hard-wired 7355, eg has only the H and N, no ground wire for its 120 side but its chassis is touching the big power centre chassis it is inserted in as the "lower portion".
My 2000w Vector inverter has a warning not to run the chassis ground over to its DC neg input. (Same as the PD converter warning only in reverse) It has to have its own wire to the frame. (Even though the inverter's neg input comes from the battery which is neg grounded to the frame. Unless the battery does nothing but power the inverter. Then it does not have to be neg grounded like with a battery powering the RV's 12v systems, many of which use the frame as the neg path)
The inverter manual says the chassis ground is to reduce radio and TV interference. it says nothing about safety reasons for the chassis ground. I don't know if the same applies to the converter's chassis ground.
So the main 30a shore power cord comes in and its big bare copper wire is grounded to the frame, the hot goes to the 30a main breaker, and the neutral goes to the N bus.
The receptacle circuit the converter plugs into is three prong with the ground prong to the frame using that same big copper wire back at the AC breaker panel. Now you run a wire from the chassis ground lug to the frame.
A built-in "lower portion" converter is not grounded like a deck mount because its chassis is touching the big power centre chassis which is grounded. The hard-wired 7355, eg has only the H and N, no ground wire for its 120 side but its chassis is touching the big power centre chassis it is inserted in as the "lower portion".
My 2000w Vector inverter has a warning not to run the chassis ground over to its DC neg input. (Same as the PD converter warning only in reverse) It has to have its own wire to the frame. (Even though the inverter's neg input comes from the battery which is neg grounded to the frame. Unless the battery does nothing but power the inverter. Then it does not have to be neg grounded like with a battery powering the RV's 12v systems, many of which use the frame as the neg path)
The inverter manual says the chassis ground is to reduce radio and TV interference. it says nothing about safety reasons for the chassis ground. I don't know if the same applies to the converter's chassis ground.
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