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I am planning an install with many devices attached i.e bellbox, detectors, Internal sounder, keypads expander, dialer etc and have concerns over the system's PS's capacity to cope with the current demand. Regarding this, when determining the current draw on the system, do you work with the...

Phew!!!!...just a false alarm then :lol: I know what you are saying...the more straightforward the installation is now, the easier it is to maintain and diagnose problems later. The whole project is becoming a bit complicated regarding hardware and layout, because it isn't just a case of a...

OH!!!....Is this not correct then - http://www.letsfixit.co.uk/html/burglar_alarms.html#TWO_PIR_CONNECTION - see paragraph about mounting sensors and running cables.

You say not more than one detector on a circuit. Do you mean that each PIR or door switch should have its own zone? I was thinking of having two PIRs on one zone i.e having the PIR detectors for two adjacent rooms on the same cable with them connected in series... would this not be OK...

Cheers chaps. Flat roofs areas over windows make it difficult to make entry holes and hide cable run so PIRs have to be fitted opposite. Need PIR in bathroom as it is a single storey building and access would be easy, particularly as the window in it is the sort where the glazed unit...

I'm looking to buy some for the alarm system and need to know of a decent quality type. Have looked around but can't figure if I need the the dual tech ones or if the normal ones will suffice. I will need a couple for the kitchen and bathroom, and in a few cases the PIR location will be...

Cheers Breezer As with most things, nothing is straightforward...looks like false alarms are inevitable...will have to share alert response duties with the Mrs!:lol: Anybody know if the Scantronic 9751 panel is good and if it accepts the dual (separate circuit) IR beam configuration...

Many thanks Breezer. Can you clarify regarding the PIR point. Are all external PIRs useless per se?...I ask as the VX-402/402R are marketed as external detectors and at a hefty price too! Doesn't this dual technology/zone stuff make them reliable? The same should be asked of wireless...

Hi Folks I need help as a recent incident has alarmed me in to taking action. The incident being that some thieving b******s recently entered my premises and managed to steal the lead coverings over the bay windows – all this while the family were asleep inside! So now, from having zero...

So I can use a RCBO as a replacement for the current MCB on the non-rcd protected end of the CU?...would be an ideal solution...don't fancy trying to re-route the shower cable across; it's like spaghetti in the CU! It is a 9.5kW shower on 10mm cable - what rating RCBO would I need, and how...

Have noticed my shower is wired to the non-rcd protected half of the CU - is that OK?...if not, why would it have been wired so as there is space on the RCD side.

Thanks for the explanation.

Have done as you said and it trips fine...not silly enough to repeatedly create shorts; fully expected something to trip somewhere between fault point and supply to house...had to know if the RCD was working as supposed to. Couldn't understand why it (RCD) didn't trip when I accidently cut into...

I have a garage CU (mains incomer) supplied from the the house CU through a 32A MCB on a non-RCD protected circuit. I noticed that the garage unit RCD was not tripping during a fault state, be that with a short form L to N or Earth...what happens is that the garage unit and the house unit MCBs...

Thanks Agile... the gas pipe with compression fittings goes behind the kitchen units but the section with the comp' fittings is right behind the tumble dryer and is easily accessible by pulling out the dryer - would that be classed as acceptable?

Behind the kitchen units I have found compression fittings on the gas run to boiler and cooker and non-sleeved pipe going through wall - is it OK to leave as is?...have been told by comp fittings can only be used where visible and that all gas pipe through walls must be sleeved - is that true?

Yes good point...plus the the gas pipe is earth clamped too...wouldn't the earth wire become a conductor in an electric storm/strike situation? Many thanks.

It's a mains cable going to power socket...does the trunking idea not help reconcile with regs?

My electric cable passes across (behind) a gas pipe making it closer than 25mm...it is an unavoidable situation - is it a problem? If it is, would putting it in mini-trunking help?