Petrol powered 5KVA (4,000 watts) Generator. When calculating the power required, you need to take into account not only the running watts shown on the appliance, but the STARTING WATTS (which can be up to 4 times the running watts) for ALL appliances you plan to run at one time. Failure to do so may result in damage to both generator and tools being operated.
Crommelins Operation & Instruction Manual
Worksafe Electrical Installations at Construction Sites PDF