Hi all. I have a new PIR sensor (click here to see details and specs, or see http://www.ebay.co.uk/itm/152080948939) which is to replace an existing one of a different type that recently started staying on after several years of service. The PIR sensor is used to switch a 28W wall-mounted light and it comes off of a spur on a socket via an FCU.
I was planning on using a 3A fuse in the FCU (which is also what the existing one used) but when I flipped the switch, the fuse blew.
Is the PIR sensor doing something it shouldn't, or is there a legitimate reason why it would draw more current? I've not been able to find too much information on PIR sensors and fusing, but I've come across a couple of suggestions to use a 10A fuse in the FCU - though reading between the lines that might just be to accommodate the potential maximum load that the PIR sensor can switch. I'm hesitant to use anything higher than 3A because that should already be 25x more than enough for the load.
What do you think?
I was planning on using a 3A fuse in the FCU (which is also what the existing one used) but when I flipped the switch, the fuse blew.
Is the PIR sensor doing something it shouldn't, or is there a legitimate reason why it would draw more current? I've not been able to find too much information on PIR sensors and fusing, but I've come across a couple of suggestions to use a 10A fuse in the FCU - though reading between the lines that might just be to accommodate the potential maximum load that the PIR sensor can switch. I'm hesitant to use anything higher than 3A because that should already be 25x more than enough for the load.
What do you think?
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