Thank you for those additional comments.

Ken.

Yeah poor topic title.

As has been previously said just power down the AUX side depends on the panel if it's got a fuse or not, 1 range of panels I know of doesn't but does have overload / short circuit protection - Scantronic.

so from your list of 1 to 6

5 Disconnect the just the +ve aux supply to the PIR's

you`ll still blow a fuse - better to disc all power

you`ll still blow a fuse - better to disc all power

What fuse?

(not that i'm suggesting Gopher 's way is best, personally I'd run the cables fit detector, power down panel after telling neighbours then connect n sod the noise, If I was DIY)

HHmmm. OK. Apologies.

Can I ask the following question:

If a professional installer is called to add an additional PIR to an existing system, would he/she do the following:

1. Put panel in service mode

2. Remove mains power

3. Open the panel

4. Leave the battery connected

5. Connect the additional wiring

6. Close up, restore mains and test

Ken

hmmm!, 20 year old kit installed by a diy installer, most likely (with respect) even unregistered like me installer would advise best to upgrade with modern kit to modern standards.

regs

alan

I have bought a new panel (with remote keypad), a siren (ext bell), sounder, several PIRs and a drum of 6-wire cable.

He`s already got that far ............ but I second Mr Potter - forget the neighbours

He`s already got that far ............ but I second Mr Potter - forget the neighbours

and the wiring standards are?

regs

alan

and a drum of 6-wire cable.

you not read the opening post?