I'm building a self-contained semi-portable device.
It will perform the following functions: Provide 300W of true sine 235VAC power Illuminate a room during a power cut, or provide a work lamp where there's no mains Charge USB devices Provide compressed air, particularly in order to inflate tyres Provide a 30A 12V DC supply for short periods.
Components include:
22Ah deep discharge battery 300W inverter 12V 200W compressor USB psu (from 12VDC) LED lamp on ball and socket 2A intelligent charger Fuse block for low current 12V circuits 30A main battery fuse 25A compressor fuse 25A inverter fuse IEC mains male for charger input 13A socket for inverter outputWhat to do about grounding? I plan to connect the following together: The earth terminal on the IEC The earth terminal on the 13A socket The metal cradle that holds the compressor The earth terminal on the inverter The metal panel that holds all the controls (this will ground all the accessible metalwork such as switch bodies and toggles.)
Questions:
- Is the above OK?
- Should I ground the negative side of the 12V circuitry or let it float? It will not be grounded via the charger or inverter.
Bill