Backup System Grounding.

[DC Indy]

Question for thought.

Charger plugged into the normal home wall outlet, that is directly connected to the System Bus Bar in the output end. 12v System. System built for backup of Gas Furnace in case of Power Outage.

Wall outlet - Charger - Bus bar - Battery - Bus Bar - Inverter (not plugged in or turned on until needed) - Furnace.

Does that make this whole system grounded?

 

[JBertok]

The DC system sounds completely self-contained, is that right? You've just got a charger and an inverter connected to a battery, the battery being maintained by the charger and the inverter sitting off and ready to move the power cable to the furnace over when needed. You don't need to ground the DC side - there is no separating distances between your components and no outdoor DC sources that could become a potential-difference path during a lightning strike. The charger might already be grounded if it's got a three-prong grounded power cable plugged into a grounded outlet. That would leave only the inverter chassis, which needs to be grounded for protection of what's plugged into it.