Certification of installation work for commercial properties

[ASHCOLE]

Hi all. I have ben asked to quote on a job for a local car sales garage. They have 12 lighting columns and want a PIR fitted on each. Do they need any certification after completion of the work as it is a commercial property? Thanks in advance.

 

[telectrix]

if you are fitting PIRs to switch existing lights, IMO a MWC will suffice, as you are modifying an existing circuit. If existing lights are controlled by switch/es, i would replace same with FCU/S

 

[Guest123]

All new electrical work should be tested to ensure compliance no matter where it is.

A MEIW will suffice in this case by the sounds of it.

 

[ASHCOLE]

if you are fitting PIRs to switch existing lights, IMO a MWC will suffice, as you are modifying an existing circuit. If existing lights are controlled by switch/es, i would replace same with FCU/S

Hi telectrix, just wondered what u mean by replace same with FCU/S?

 

[telectrix]

PIRs need permanent feed, so i would replace the light switches with FCUs. 1. ease of isolation. 2. not liable for joe bloggs to turn off by mistake

 

[ASHCOLE]

Good point. Im going to look at the job tonight so havnt assesed the work yet, iv not long set up and it is my first commercial job since going alone. Im experienced in the work, just getting used to the business side of things and having to certify work myself. I know that an alteration or addition to a circuit requires a minor works, just was unsure about what is required for commercial/insustrial work. Thanks

 

[mogga]

Im assuming you mean car sales garage ?? Minor works as your Altering circuit also you could suggest splitting the 12 cols so they arent ALL on all night I ddi this recently at my local wee garage he now has Blackpool from dusk till around 10pm then only 4 corner lights providing enough lighting for his CCTV to work and not enough power to upset his wee book keeper with big bills

 

[ASHCOLE]

He wants an extra floodlight on each column, around half way up, with a PIR on each. When a PIR detects movement he wants the light to stay on until it is manually switched off. The problem they have is their sales forecourt is absolutely massive and even with a guard patrolling, the cars are still getting stripped. The lights get switched off at 10pm you see because of the neighbours complaining. So they want it so when a PIR detects presence, the individual floodlight (zone) will light and the guard will have to go and investigate, and once is clear, switch it off. Its going to involve relays, timers etc. The lights are all controlled by one main switch. Any suggestions on the best way to do this? Maybe a 3 midway switch so that position 1 = normal lights, position 2 = off, position 3 = security PIR mode? Any thoughts? Thanks, Ash

 

[telectrix]

if you are going to use the PIRs to energise relays, as the relay coil is inductive, you will need to fit a capacitor across the coil/s. round about 0.1uF.otherwise the inductive load will cause the PIRs to nuisance activate