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Hi I am trying to understand the arrangemnt in my main incoming supply. Could some please explain the following: 1. Why is the main service 60A fuse is not sealed. 2. Why do I have a 32A sealand fuse to the right of the main service fuse, what is this for. 3. What is the black box to the...

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Hi I have a 17th Edition Hager Dual RCD CU and want to replace the RCD's amd MCB with RCBO's. The neutral bar is split into 3 with two strips for the RCDs. If I want to fit RCBO instaed of RCDs and MCB what would I have to change in the CU? 1. Neutral bar becomes one. 2. All RCBO's...

I need some advice on how to tackle installing and outside tap on a Range Tribune HE system. The tap will be teed off after the mains under the sink well before the Range He cylinder. My worry is what effect will this have on the pressure in the Range Cylinder. If I close the main stopcock on...

Hi Could someone please explain what a Bib tap is and if it has a check valve does that mean a separate double check valve is not needed. Thanks

Hi I am thinking of changing from a vented system to an unvented system with a Worcester Bosch boiler. Can anyone reccommend a good quality cylinder and should I opt for a pre plumbed one. I currently have two heating zones and one hot water zome. I'm sure my plumber will have some...

Hi I have an Ideal Mexico RS Super boiler (cast iron heat exchanger) which has been very reliable, only changed the thermocouple in 20 years and still working fine. Thinking ahead sooner or later this will pack up and need replacing, I was thinking of Ideal again, say a condensing...

Gents Can anyone please identify the make of the 22 way CU in the picture. I need to get a replacement front cover. If so do you know of a stockist in the London area. Thanks

Hi I want to run a supply to the detached garage which is only a couple of meters away from the main building, my question is do I still need to treat this as an outbuilding? My main supply is PME, i understand that you are not allowed to export the earth from a PME supply to an out...

Hi I have a 22mm copper pipe running from the meter under the floor which branches off into a 15mm feed for the front room gas fire. Still in 22mm it continues and branches off to feed the hob in 15mm and then on to the boiler also in 15mm. I plan to resite the boiler and need to branch...

Hi I hope someone out there can give me a definitive answer. I need to install an extractor fan in Zone 1 above the shower cubicle but because I have a low ceiling the fan could be within reach of a tall person using the shower. I know that using a SELV 12V fan will do the job but my...

Hi all I have one of these fitted in a new build, can you please tell me what qualifications should I be looking for in the engineer when getting it serviced every year. I understand I should be looking for an engineer with a 'ticket' for unvented systems. Could you please explain what this...

Hi Does anyone know why the Italians use Type C MCbs in a domestic environment. Was over there recently and noticed that in a domestic environment they all use double pole type C's. Just curious....thanks

Hi I've heard the term Stuffing Gland which I believe is used for non armoured cable. Could someone please explain where these glands would be used, are they waterproof and how are they assembled say in an IP56 box for use outside. Do they differ from PVC glands in any way? Pics would...

Hi I need to run a supply to the garage at the end of the garden, approximately 30 meters from the house. The load on the garage will be just a tumble dryer and a light and there is no water supply in the garage. The main building supply is PME and theres is no spare ways in the CU. The...

Gents Missus wants lights on the patio of the type that stand upright. I am not a practising spark but many years back I did do my C & G Part1 & 2 and also the Inspection and Testing qualification. As a non practising I am a little out of date with current practises...not to mention the Part P...

Hi I have a Creda dryer, drum rotates all seems to work fine but will not heat the air. Does anyone know what could be the problem. I've done a continuity test on the heating elements and that checks out ok. Thanks Julian

Hi I hope you can help me with a problem and suggest a solution. I live in a flat the CH/HW system is open vented with the cold water tank (about 15gallons, fairly small) directly above the hot water cylinder which is of standard size, both are in the airing cupboard. The cold...