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Andyha

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Andyha last won the day on September 17 2020

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  1. For the benefit of Artur1975 the original poster who may not be helped by debates on colour coding of cores, you will see there are multiple options for the cores. I recall, back in the 80's that lots of companies (Thorn, Moderns, Security Centres, Grantly, Acorn, MR, BT, Custodian (and many more)) used red/black for power, green white for tamper and blue/yellow for alarm. However some companies may well have used other colour combinations. The point is that the only way to establish what the colour code used is, is to look and see and meter and measure. Don't kn
  2. Harsh but probably true Unless however you like retro. By convention, back in the "good" old days the alarm pair would have been blue and yellow and the tamper pair would have been green and white. Go to the panel and see what coloured cores are connected to zone 3 alarm. trace those to the cable to see if the cable is 6 or 8 core. If 6 core then there is no reset line however a reset can sometimes be performed by dropping the power (positive) to the line of vipers. To be honest, back then a resetting line for vipers was a bit of a rarity unless actually specified by an ex
  3. Just power the bell/siren direct off the battery while you work on the panel. This will hold the SAB silent. There will be a short blip (duration of however long it take you to remake the connection) I normally prewire a common neg and only disconnect and reconnect the positive. Use a lead with a spade terminal one end and an insulated crock clip the other (or crocks both ends)
  4. No - reset is done with the PIN. Don't forget this is a burglar alarm so at it's heart is security - it's not supposed to be powered down and up again to reset - otherwise the burglar would be able to do that! If you don't know how then you will need to check the manual. If you don't have the manual you can search the interweb for it. If it needs an engineer reset that will be a different code - if you don't know the engineer's code you will need the engineer's manual which should tell you how to default the panel (which is not just powering it down and back on again). Again, sear
  5. I would think the panel is still "in alarm". Perhaps it needs to be reset, possibly engineer reset (different code) It is common for the sounder to silence but for the strobe to continue to activate - this was to indicate where the alarm activation was. It is unlikely that the bell/sounder/strobe assembly has just developed a fault - credit to you for disconnecting wires and measuring voltages etc but you might be heading towards the "somethings gone wrong" route when in fact the answer is most likely more simple.
  6. Hello all I thought I would drop into this one as it's an interesting topic Assuming this is a standard transformer (no reason to assume otherwise) it is fairly simple: I have done this myself before where the old panel is not replaceable and the only thing failed is the transformer. I would rather spend what £20 on the transformer that £100 on a whole panel noting though that of the transformer has failed the panel may follow (it can be counter productive to keep old systems going as they will fail totally eventually). Things to watch for: Output voltage of the new trans
  7. Ceiska I am going to add some answers to your post but I agree with others that there is really too much detail here. Question - what is your motivation for seeking this information. Do you want to get into security, are you just curious or are you an aspiring burglar Whatever the reason while I can see your are interested you need to get a job in the industry. This is a practical industry: you need to install this stuff for much of this information to mean anything. There are a myriad of options and alternatives and many different ways of achieving the same outcome all o
  8. I think we would have to agree to disagree Note also that the basis of this thread is to help the original poster. All I am saying is "do be careful" So you may be right that it is "not true" under certain circumstances, with certain insurers and with certain polices, however the time to find out I am right is not after a claim is refused So I repeat: "do be careful"
  9. Good point well made on 6A/H battery and caution Must admit I had not done the load to amp/hour calculation while writing that post Hopefully useful to the original post and yes, far to many will run a 1A PSU at 950mA load or more cos it can so it must be right
  10. There was, I think, a bit of an issue with COTs G4 panels being self assessed at G4 as opposed to being independently tested. There was also an issue with detectors which have to be mapped to the panel at G4 I believe, so a detector from manufacturer A would not work with manufacturer B's alarm panel because of the encrypted protocol exchange between the two. It's interesting that some believe G3 is OTT and inappropriately specified by architects and engineers alike - heaven help us all if G4 became the base standard for all those who just pick the highest number from the standard be
  11. No offence taken But Not a comment of a great deal of assistance to the original poster It is a well documented issue - Thank you PeterJames for your post Speak to the ABI for more examples and for their general advise to their members on what constitutes "using all means available" It is a fact that if you leave a window open or unlocked or fail to lock your doors it is seen as thus and may affect any payout. I agree though that it is both policy specific and subject to the claim details and insurance claim assessors due diligence in asking a
  12. Agreed the capacity of the PSU must be adequate to support quiescent current and recharge of battery at the same time. Thus I specify PSU load to be not greater than 50% PSU capacity. What seems like a simple question has quite a complex set of answers
  13. Interesting The quiescent current of the system is the load off the battery when there is no mains power noting that in systems with multiple distributed PSU's the load is in fact taken for each PSU (it is not aggregated) The alarm load is similarly taken for each PSU with the alarm activated (i.e. sounders and strobes, any relays and other alarm loads being driven I don't believe the recharge load to the battery, while very important, counts in this calculation The calculation is for establishing the simple battery autonomy. For each battery you take the quiescent current
  14. Some wise words going on here Most (probably all) insurers that require an alarm to be fitted as a condition of insurance mandate the use of an NSI or SSAIB accredited installer and that it has a maintenance contract (and that it is serviced at a frequency in accordance with the requirements for the system type). I doubt any accredited installer would be happy to install the alarm and certify it without having a maintenance contract and not just because of the revenue stream associated with said maintenance contract. Some may but will caveat their quote against any liability if the alarm
  15. There are no grade 4 IAS panels on the commercial off the shelf market in the UK. Grade 4 is only available to Government/Military who need an additional level of security. There are very few (like 2) grade 4 detectors - also not available as COTs Assume it is for signalling only or ask for a Threat and Risk Assessment that informs a G4 solution.
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