38 replies to this topic

[progear]

I was wondering is there any regs reguarding when a roller shutter is wide enough to need a contact on both sides? I have a job starting soon and the R/Shutters are about 3.3m wide.

[norman]

good practice would be 2

[IAS]

about the same as a length of trunking then - would usually only be a single but depending on if classed as a primary or secondary device in the risk assesment.

[alterEGO]

norman, on 21 May 2011 - 07:52 PM, said:

good practice would be 2

qfa

[magpye]

Two, different circuits.

[MrHappy]

magpye, on 22 May 2011 - 09:32 AM, said:

Two, different circuits.

confim on one door?

[alterEGO]

MrHappy, on 22 May 2011 - 09:45 AM, said:

confim on one door?

could group them not to confirm, but yeah i know what you mean. We have had to use beams on a few due to them being rammed/cut.

[norman]

yeah, but not everybody lives in Salford.

[alterEGO]

norman, on 22 May 2011 - 10:37 AM, said:

yeah, but not everybody lives in Salford.

Salford?

[progear]

Looks like it will be two contacts in series into one EOL circuit.

[IAS]

progear, on 23 May 2011 - 07:02 PM, said:

Looks like it will be two contacts in series into one EOL circuit.

sorry, which panel, what grade etc .......... and any chance of a drawing how you intend to do it?

[progear]

IAS, on 23 May 2011 - 07:04 PM, said:

sorry, which panel, what grade etc .......... and any chance of a drawing how you intend to do it?

Hmmm..... Tricky to put into words, like a set of double doors two contacts across 1 resister then EOL and back to the panel. Its a grade 2 system so all connections will need to be made in appropriate JB's. I plan to series up the tampers i.e. R/S loop and JB switches then sort the 2 contacts across one resister bit.

[progear]

Well I haven't gave the G3 option any thought because it's a G2 system but.....correct me if I'm wrong thats why I'm on this forum, the circuit wiring will stay the same but the RS's will need to have magnetic tampering detection the JB's are already G3 so no change there. Is there anything else?

[alterEGO]

progear, on 28 May 2011 - 09:53 PM, said:

Well I haven't gave the G3 option any thought because it's a G2 system but.....correct me if I'm wrong thats why I'm on this forum, the circuit wiring will stay the same but the RS's will need to have magnetic tampering detection the JB's are already G3 so no change there. Is there anything else?

He is just trying to catch you out, trick question.

[Oxford]

As far as I can see from this post, it's a grade 2 system so you'll be fine with a single contact.

[alterEGO]

Oxford, on 29 May 2011 - 09:37 AM, said:

As far as I can see from this post, it's a grade 2 system so you'll be fine with a single contact.

That is not correct, the grade makes no difference to the amount of contacts. If the shutter requires 2 due to size then it gets 2. We tend to go with a contact and IR beam these days due to shutter being cut or rammed.

[Oxford]

a 3m roller will be fine with1 contact - that's all I was saying.

[Michael Boty]

progear, on 21 May 2011 - 06:55 PM, said:

I was wondering is there any regs reguarding when a roller shutter is wide enough to need a contact on both sides? I have a job starting soon and the R/Shutters are about 3.3m wide.

Over 6 feet wide, 2 Contacts. Measurement gives age of advice but holds well. Not nice to see door wedged open other side to contact and access gained by undesireables.

[psycho_49]

Not only that but roller shutter contacts have very high tollerence sometimes upto 30 mm therefore over 3mtrs should really be 2 contacts confimed right away, or intruder if lifted from one side..

[RFS]

psycho_49, on 16 February 2012 - 06:28 PM, said:

2 contacts confimed right away, or intruder if lifted from one side..

Are you for real? Please tell me you don't work in this industry full time?