This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

Where to install a surge protection device - single phase domestic / light commercial supply

A surge protection device can be installed in two locations:

1. The consumer unit. This is the easiest to install but it takes up two spaces which may not always be available.

2. The isolator switch. This is more difficult to install as it involves having to remove the big fuse but it avoids taking up two spaces in the consumer unit.

Does anybody have any more comments or advice on the best location?

Proteus sells an attractive looking isolator switch with a 2 module SPD although it is a bit pricey compared with SPD modules for consumer units. Has anybody got experience of it?

Who actually owns an already installed isolator switch? Is it National Grid, the utility company, or the property owner?

Parents
  • I have just returned from Screwfix/Electrafix to collect an order. I notice in the Electrafix side of the store that there was a poster for electrical stuff showing a BG single module SPD for £24.99. Clearly not a King's ransom.

    It would seem to me to be cheap insurance? Certainly much cheaper than most of your electronic filled appliances, the PCB in your boiler and your smoke alarms.

    A few years back I lost a modem along with 2 other neighbors after a thunderstorm , We have overhead phone lines. BT master socket with internal surge protection but now have SPD protection on the phone line.

    A couple of months back after a storm my TV signal was poor with a lot of pixilation on some weaker stations. Looking outside up at my aerial I installed my self it was pointing uphill rather than previously level as installed. I thought that was the cause of the signal loss also it was an old analogue aerial, 50 ohm comms co-ax not 75 ohm TV stuff and the co-ax no doubt full of water. Not being as brave as I was 25 years ago I thought it was time for a new digital aerial, 75 ohm co-ax installed by a professional. Job done and the aerial fitter measured the signal at the end of the new co-ax before plugging it in to my distribution amplifier saying good signal any more and I would have to install an attenuater. After he left I could see I had an improved signal on the TVs but still some pixilation. I jumped out the amplifier connecting the aerial directly to one TV and no pixilation with more channels than I previously had. Trip to Screwfix to buy and install  a new amplifier thinking the amplifier was spiked. New box fitted TVs now operating better than ever. Opened up the old box to look inside and could see a track between on the PCB between in input socket conection and an adjacent PCB track. I have the photo and have now fitted an SPD to the aerial amplifier.

    I already have a Wylex REC 4 isolator with SPD protection inserted in the meter tails. Just need to do something for the recently installed amateur radio 1/2 wave end fed outside antenna.

    Happy New Year.

    JP

Reply
  • I have just returned from Screwfix/Electrafix to collect an order. I notice in the Electrafix side of the store that there was a poster for electrical stuff showing a BG single module SPD for £24.99. Clearly not a King's ransom.

    It would seem to me to be cheap insurance? Certainly much cheaper than most of your electronic filled appliances, the PCB in your boiler and your smoke alarms.

    A few years back I lost a modem along with 2 other neighbors after a thunderstorm , We have overhead phone lines. BT master socket with internal surge protection but now have SPD protection on the phone line.

    A couple of months back after a storm my TV signal was poor with a lot of pixilation on some weaker stations. Looking outside up at my aerial I installed my self it was pointing uphill rather than previously level as installed. I thought that was the cause of the signal loss also it was an old analogue aerial, 50 ohm comms co-ax not 75 ohm TV stuff and the co-ax no doubt full of water. Not being as brave as I was 25 years ago I thought it was time for a new digital aerial, 75 ohm co-ax installed by a professional. Job done and the aerial fitter measured the signal at the end of the new co-ax before plugging it in to my distribution amplifier saying good signal any more and I would have to install an attenuater. After he left I could see I had an improved signal on the TVs but still some pixilation. I jumped out the amplifier connecting the aerial directly to one TV and no pixilation with more channels than I previously had. Trip to Screwfix to buy and install  a new amplifier thinking the amplifier was spiked. New box fitted TVs now operating better than ever. Opened up the old box to look inside and could see a track between on the PCB between in input socket conection and an adjacent PCB track. I have the photo and have now fitted an SPD to the aerial amplifier.

    I already have a Wylex REC 4 isolator with SPD protection inserted in the meter tails. Just need to do something for the recently installed amateur radio 1/2 wave end fed outside antenna.

    Happy New Year.

    JP

Children
  • It was a bit careless of you John " I lost a modem along with 2 other neighbors" to lose those two neighbours however I am pleased you got your TV etc sorted out Sunglasses