To protect against electrical shock hazards the IC Series metal chassis must be connected to the DC grounding system. The DC grounding system is sometimes referred to as the earth ground or another designated ground. For example, on an RV, the metal frame of the RV is designated as the negative DC ground/RV ground. On a boat, the ground is simply referred to as boat ground.
The IC Series Inverter/Charger consists of a DC and an AC section that are isolated through a transformer. Both these sections are required to be grounded appropriately.
The DC ground wire connection on the IC Series is used to connect the exposed chassis of the Inverter/Charger to the DC grounding system. Use copper wire that is either bare or provided with green insulation. This terminal accepts CU/AL conductors from #14 to #2 AWG (2.1 to 33.6mm2). The size of this conductor should be coordinated with the size of the over-current devices used.
In Marine Applications the DC Ground wire has to be the same size as the battery negative cable. To attach a larger gauge wire, follow these steps:
- Remove the M8mm nut and star washer holding the DC ground wire connection boss to the metal chassis.
- Remove the connection boss and store safely.
- Attach the correctly sized ground cable with a ring terminal to the Inverter/Charger Chassis. The ring terminal must have a hole size ≥ 1/4”.
- Place the M8mm nut and star washer over the ground cable and securely tighten the nut.
DC grounding involves proper grounding of the negative terminal of the battery, the DC panel, and the DC side of the Inverter/Charger. The DC panel is normally used to connect the batteries and distribute DC power to the Inverter/Charger and to the other DC loads.
A common earth ground should be used to bond the Inverter/Charger, negative bus bar, and the negative battery terminal.
All connections must be tight against bare metal. Use star washers to penetrate paint and corrosion.