ATPL - Fire precautions to be observed before refuelling are:

Question id 287 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

Ground Power Units (gpu) Are Not To Be Operated.

All bonding and connections to the earth terminal between ground equipment and the aircraft should be made before filler caps are removed.

Aircraft must be more than 10 metres from radar or HF radio equipment under test.

Passengers May Be Boarded (traversing The Refuelling Zone) Providing Suitable Fire Extinguishers Are Readily Available.