I will not touch the main fuse as would rather not have the hassle. Been told today by western power that they no longer (from June 2019) supply 100A cutouts to domestic premises, A max of 80A is permitted, the reason given is that they can not guarantee the ambient air temperature in the cut out box can be kept below 30 degrees. Eaton’s Cooper Power series electrical distribution class fuse cutouts are available in a variety of types: universal, arrester combinations and loadbreak types. So now I have 25mm^2 tails and a 100A fuse - happy days! They didn't require me to request a new connection, that doesn't sound right. Meter tails upgraded from 16mm to 25mm with 100A double pole switch, would have been ok at 16mm but thought would change at the same time. If you are going to do it, my advise would that, you shouldnt, but if you do, ensure theres NO LOAD, so switch the consumer unit off, then take firm hold of it and pull it out in one smooth but swift movement. I've a 60amp fuse currently and the company looking to install a Rolec charger asked me to get in touch with Western Power who 'usually' upgrade to 100amp. For what it's worth, WPD offered to come out and check/replace the cutout fuse for free with the rating depending on the size of the existing meter tails - max 80A on 16mm^2 and 100A on 25mm^2. And they weren't long in coming to do it, from the time of my request either. All exploritory at this stage as I don't even have an EV yet, but looking longingly at the Zoe ZE50! If you want to change the CU you will have to have an isolator fitted. All cutouts provide reliable overcurrent protection for primary distribution systems. Hi - I have been asked to do a Consumer unit change for a property that comes under the Western Power area. ... (me80/60) in cut out trust me 25mm won't go in. Next job is to get an electrician in to replace the old fuse board, upgrade the remaining 16mm^2 section, and everything will be up to scratch for a charger installation. The whole fuse holder part (sorry I don't know the correct term!) Reply to main fuse/ tails upgrade in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net. Guy said - we don't pull the fuses except in an emergency. When the shed/workshop/childrens play room was built. (But it does have a retractable roof, like the millenium stadium in Cardiff). had to be replaced as it was of early 70s vintage and could only support 60A max. The cutout is made by BICC, the 60A fuse had a small fuse carrier, so had to be swapped over for a larger size (dimension) to accept the 80A. They are willing to split the supply via a 3 core supply cable using just two of the cores to provide two supplies at two 80A cutouts. Reply. I'm due a visit by SSE soon as I have asked them what size main fuse is in the cut-out (and sent them a pic of the BICC bakelite cutout) but it was not on file (understandably) so they will come out, pull the fuse & check for me. !!! 60A Fuse upgraded to 80A Fuse by Western Power DNO. Thats my thoughts anyway. P. paul_h. Western power come out and despite the labels saying 60Amp fuse there was an 80 inside. I rang today to arrange to have the main fuse pulled. Western power not only did a free upgrade from 60 to 80 A fuse for me, they also changed the cut out to cope with it. Western Power Distribution upgraded mine from 60A to 100A for free. Power distribution upgraded mine from 60A to 100A for free for a property that comes under western. To main fuse/ tails upgrade in the Electrical Wiring, Theories and Regulations area ElectriciansForums.net! Request either not have the main fuse as would rather not have main! 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