External alarm cable and BS4737
 

We have an overhead alarm cable which runs between the two buildings at our
site. The cable runs from just below the roof of the two-storey building to the
base of the chimney breast on the single storey building. It is protected in
conduit attached to a metal catinery cable.

My query is that the conduit hasn't been run right up the brickwall of the
two-storey building and does this constitute a violation of BS4737?

There is a gap of about 10cm where the cable isn't protected, whereas on the
single storey building the cable enters the building via a circular JB and is
fully protected.

You help would be appreciated.

Thanks

Alex




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Alex Harris
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External alarm cable and BS4737
 

In article ,
Alex H wrote:
We have an overhead alarm cable which runs between the two buildings at
our site. The cable runs from just below the roof of the two-storey
building to the base of the chimney breast on the single storey
building. It is protected in conduit attached to a metal catinery cable.

My query is that the conduit hasn't been run right up the brickwall of
the two-storey building and does this constitute a violation of BS4737?

Is this carrying mains? Most alarms are low voltage so no regs.

--
*Sherlock Holmes never said "Elementary, my dear Watson" *

Dave Plowman London SW 12
RIP Acorn

External alarm cable and BS4737
 

On Thu, 04 Sep 2003 00:30:16 +0100, Dave Plowman wrote:

Is this carrying mains? Most alarms are low voltage so no regs.

Power wiring regs maybe but there are several that relate to alarm
wiring.

--
Cheers
Dave. pam is missing e-mail

External alarm cable and BS4737
 

On Thu, 04 Sep 2003 10:04:02 +0100, Dave Plowman wrote:

Ah - I don't know my BSs. Doesn't seem to have made any difference
to the number of false alarms round here, though.

DIY alarms probably aren't fitted in accordance with the standards or
even with regard to correct siting of PIRs etc.

If you want a monitored system and police response having false alarms
is a big no-no now. ISTR three false alarms in a rolling 12 month
period and the police won't bother at all and it puts a black mark
against the alarm company. I think there is also now a requirement for
monitored systems to be able to report to the monitoring station which
sensors have been triggered and in which order and needing at least
two separate but logically connected sensors to be triggered as well.
For example the PIR in a room and a door contact of that room. There
may even be a requirement to be able to listen to the property to
verify the alarm.

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Cheers
Dave. pam is missing e-mail

External alarm cable and BS4737
 

In article ,
Dave Liquorice wrote:
Ah - I don't know my BSs. Doesn't seem to have made any difference
to the number of false alarms round here, though.

DIY alarms probably aren't fitted in accordance with the standards or
even with regard to correct siting of PIRs etc.

There are two offenders near me which go off at least twice a month. And
both are pro installations.

--
*What was the best thing before sliced bread?

Dave Plowman London SW 12
RIP Acorn

External alarm cable and BS4737
 

On Thu, 04 Sep 2003 17:42:09 +0100, Dave Plowman wrote:

There are two offenders near me which go off at least twice a
month. And both are pro installations.

Still doesn't protect against idiot users though.

Expanding foam is quite good. B-)

It was used on the local Co-ops bell box last year. How they managed
to get it in without raising suspicion is beyond me, said bell box is
in the center of a plain wall (no windows, drain pipes etc) and a good
25' above the ground. This wall faces a large open area in the middle
of the town. I guess every one is tucked up in bed in the wee small
hours up here. Plenty of people live and overlook this open space.

--
Cheers
Dave. pam is missing e-mail

External alarm cable and BS4737
 

"Andrew Gabriel" wrote
| "Dave Liquorice" writes:
| Expanding foam is quite good. B-)
| It was used on the local Co-ops bell box last year. How they
| managed to get it in without raising suspicion is beyond me,

They got some bright yellow overalls, wrote "ADT" on the back in blue paint,
and went up a ladder in broad daylight?

| I saw a picture of a dutch Gatso with expanding foam oozing out
| of every tiny gap in the casing...

Isn't killing gatsos a Dutch national sport?

Owain

External alarm cable and BS4737
 

On Fri, 5 Sep 2003 13:43:30 +0100, Owain wrote:

| It was used on the local Co-ops bell box last year. How they
| managed to get it in without raising suspicion is beyond me,

They got some bright yellow overalls, wrote "ADT" on the back in
blue paint, and went up a ladder in broad daylight?

Nice idea but those chaps where chipping bits of box and foam of the
wall after the event.

--
Cheers
Dave. pam is missing e-mail

External alarm cable and BS4737
 

On 5 Sep 2003 10:12:40 GMT, Andrew Gabriel wrote:

There's a detector for that which you can put in the bell box.

A break beam switch of some sort I believe.

Normally, such premises would have more than one bell box.

I don't think this one has but I would expect it to have a monitored
alarm anyway. The bell box would just be there to alert the locals who
might take action pending the arrival of the police, this could be the
best part of an hour assuming they had some one available to attend
straight away simply due to the distance they'll have to drive.

--
Cheers
Dave. pam is missing e-mail