few questions regarding filling domestic eic. under particulars of installation at the origin it asks for number of smoke alarms. Do you only fill this in if you have fitted the smoke alarms yourself or do you fill it in regardless. insulation resistance test line/line i take it this is only on ring mains. is it testing between live to live on each leg i know it sounds stupid asking. max zs for 40amp 60898 type 2 is it the same as a type b 1.15 and what is the max disconnection time permitted is it 0.4s. thanks any help would be gratefully received.