What size is the swa and what size is the main fuse ?
You do have a good point. My house is on a 60A fuse and I have a few times said what happens when the DNO come into a house and replace the fuse?What size is the swa and what size is the main fuse ?
Interesting question. However, the main fuse will presumably be at least 60A and that SWA doesn't look to me to be 10mm² or more. Furthermore, the feeds from Henleys to RCD look like only 10mm², which would be a problem if the main fuse was 80A or larger. In any event, reliance on the cutout fuse for protection of cables is surely not 'good practice' and I imagine may well represent a problem for the DNO (if they find out about it).What size is the swa and what size is the main fuse ?
... may well represent a problem for the DNO (if they find out about it).
Agreed, but they seem to be unhappy about long meter tails, yet happy if one protects such tails with a switchfuse which, in practice, would offer little or no discrimination from their cutout fuse - so I cannot pretend to understand their thought processes.But if the subsequent fuse protecting the SWA was also 60A, then nothing has changed. No discrimination.... may well represent a problem for the DNO (if they find out about it).
Agreed, but they seem to be unhappy about long meter tails, yet happy if one protects such tails with a switchfuse which, in practice, would offer little or no discrimination from their cutout fuse - so I cannot pretend to understand their thought processes.But if the subsequent fuse protecting the SWA was also 60A, then nothing has changed. No discrimination.... may well represent a problem for the DNO (if they find out about it).
Kind Regards, John.
One would imagine that would be their view. However, provided they didn't advocate it (which I'm sure they don't!), I don't think they would acquire any responsibility for protecting a customer's installation if that customer chose not to install any protection of their own. Nor can one really explain it in terms of 'convenience' (for the DNO), since a switchfuse which offered little discrimination from the DNO's fuse (with which they seem perfectly happy) would mean that the DNO's fuse would be quite likely to operate under fault/overload conditions.Perhaps they don't want to take any responsibility for protection of the customer's installation, seeing as the main fuse is there to protect their network and is not part of the installation.
Its one of these...RF Lighting, I know that this was posted as an example of something done incorrectly. But can I ask, is this a example of where the meter tails have been split. Is the black box on the wooden board below the CU a Henley Block?
Yes and Yes.But can I ask, is this a example of where the meter tails have been split. Is the black box on the wooden board below the CU a Henley Block?
Some may have been tempted to double them up to simulate 5mm² 2-coreFor those interested, the SWA was 2.5mm² 4 core with 2 unused cores for some reason.
Agreed. I should have added that to what I said.I'd have at least tied them to earth. You can't have too big an earth
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local