mj,
Being a Fire-fighter and an Electrician, I do quite a bit of Fire Investigation work,
for the New Zealand Fire Service in our provincial area.
To simply call an incident,"an Electrical Fire", without total investigation, is really stupid.
A fire caused by Electricity is really only caused by bad protection device selection or by wrong cable sizes hooked to over-rated fuses.
Saving this, there are also thermal effects from installed light fittings, where thermal
insulation is installed later over the top of these.
Bear this in mind, that anything will burn given a high enough temperature, I've seen
Concrete(Cement) burn, in an exceptionally hot fire that we fought recently.
But to say that a fire marshall(whom I have the same experience as), would go the easy way out and say this, I find amazing.