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I will be running some 16mm^2 3-core SWA. Most of the run has bends which are within an acceptable min bend radius. However, the final end of the run goes 2.5m up an exterior wall, w/ a sharp 90 degree bend through masonry and some 1st floor joists to the CU. The problem is I don't have much...

I did think about that, and am still conflicted about it. The plan was to use 30mA RCDs in the workshop, and a 100mA at the supply. Since each machine will be on it's own circuit then I should be able to get away with trips on the supply, but yes, any trips on supply will be a huge PITA. No harm...

That americans drive on the wrong side.

Assuming the height of the bathroom is 2.4m, that is a total area of 5.7m^3 - The fan will displace around 3.6m^3 a minute, so it will take about 2.5 minutes to clear 5.7m^3 (best case scenario). Although if you factor in ducting length, type, cowl, duct size then it'll affect throughput...

Just for clarity's sake, I was always intent on using an RCBO type of arrangement to feed the outbuilding. I was merely curious as to whether there was a reason why some sparks were omitting MCBs, which to me seemed a bit silly and dangerous.

That is a fair point. I guess over provisioning is normal business practice in this day and age.

The 50-60a will be the case once I have upgraded to a 100a supply. I am using inverter MIGs primarily so I can cap the input current and won't need to fork out for a 3-phase supply, or annoy the neighbours. With that said, surely I won't need to ask for permission to use 60a when I have paid for...

It's a bit convoluted but at the moment I have a 40 amp supply, and the supplier has offered to upgrade it to 60a for free which should suffice in the short to medium term. Eventually I plan to upgrade to 100a. I am anticipating about 15-20a peak at the moment. BUT, I do intend to purchase some...

Have you calculated the air volume of the bathroom before selecting an appropriate fan ? You will also need to factor in any bends and ducting material. Using flexible duct is the worst possible decision you can make. It will create too much turbulence, increases chances of air condensation and...

Yes, precisely my thoughts, but I've seen people use a 100ma T/D RCD only, so no over current protection. It'll be either 16mm^2 or 25mm^2 SWA (still to finalise max current for all machinery), and about a 25m run. The plan is to run it under the floorboards, out the 2nd floor exterior wall...

Hi Guys, Does anyone here use RCBOs/MCBs between the mains and an outbuilding CU? I've heard of people using time-delayed RCDs at the mains, but what if the run between the buildings is damaged for whatever reason and there is a short between L-N?

On the topic of expanding foam, what a blessing, what a curse.

Hi Guys, Is it normal to have a 400v mains isolation switch for a 240v supply?

Thanks for the replies guys. I want to grind because the ceiling is already not very high, so using SLC/screed will only reduce it more. The area in at the entry of the garage door, so I can't put a workbench to conceal it alas. :( That is a BRILLIANT idea. I'm going to do that before grinding...

Thanks for the replies guys. Just checked, 50 quid per mm per plate, bloody hell! Am I really looking at 500 quid just for the plates here? Don't think I am willing to pay that much, I'm already spent way too much on the slab. What do you think of using a grinding disc on an angle grinder...

Hi Everyone, We laid down a slab a few months ago. The readymix guy ran out of concrete and we had to get another one out to finish the job. This resulted in the last segment being about 10mm higher than the rest of the slab (due to thicker consistency). The slab size is 5600mm X 5400mm. The...

Thanks woody. That is a good suggestion, although I couldn't finding anything useful on "cover strips" when doing a quick google. Maybe they go by a different name?

Hi Guys, I have purchased a sectional door that will be installed on the inside of my garage. I took some measurements of the garage opening, and it is 20mm taller than the door. How can I "fill in" this gap? I tried to do a 3 coat (2 scratch) s/c render (+waterproofer) on the underside of the...