help compleating domestic electrical installation certificates

[mcm]

a few questions can anyone please help.

on the second page particulars of installation at the origin, it states number of smoke alarms do you fill this in if you have fitted the smoke alarms yourself or do you still fill it in i.e put down 2 even if their is 2 smoke alarms in the house.

under main switch or circuit-breaker if it is a sub main do you put the main switch in this case a 61009 rcd or the mcb 60898 type 2 feeding the board.

is the max zs permited for a 60898 type 2 the same as a type b.

insulation resistance testing line/line what is this live to live on a ring main only.

 

[Mark.W]

Only the work you cover! If you install a single circuit then NO, if you do a board change then YES!

Main Switch will be the 61008 Rcd on a sub board.

60898 type 2 ?? Do you mean 3871 type 2 ? If so then NO!

IR Line/Line, I thought that was for 3 Phase only...!?

Cheers

 

[spud1]

1) I have never seen smoke alarms detailed under the particulars of the installation ? What is the design of your cert?
2)Main switch or circuit breaker refers to the main switch or circuit breaker for the INSTALLATION not the submain. IE main switch on incoming consumer unit so 61008 by the sounds of it
3)type 2 ? sounds like a BS3871 MCB you have there not a BS60898
4)I R line to line refers to three phase only not applicable for ring circuits


Spud

 

[mcm]

yes 3871 type 2 40 amp what is the max disconnection time permitted.

thanks for your help

 

[Mark.W]

Disconnection time is either 5s or 0.4s or 0.2 (for TT) and Max Zs is 0.82

 

[mcm]

for a tn-s system

thanks

 

[Mark.W]

5s or 0.4s and max Zs of 0.82

 

[spud1]

5 s if cabling run surface and supply outlet rated greater than 32A. (which i assume it is if 40A) is it a shower or cooker? only 0.4 s if cabling behind plaster or in partition @ depth less than 50mm

 

[mcm]

sub main feed to board clipped direct

thanks

 

[spud1]

5 secs then

 

[robd]

1) I have never seen smoke alarms detailed under the particulars of the installation ? What is the design of your cert?

Spud the NIC forms have a box for that in particulars of the installation , I've always filled it in whether or not they were installed by me.