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Hi, can a gas pipe be laid in a channel in concrete floor and then concreted over? Gas supply to a new hob in kitchen is over the other side of room so need to get supply over there. I'm doing all the prep work before the plumber comes to put the pipes in. So just making sure before I chase...

Hi, a friend of mine has had a new meter installed. The installer said to her you need an earth. When I looked at it there are no earth cables visible from the incoming supply casing to an earth block, nothing up to the up to the consumer unit or anything visible out to the gas/water pipes. On...

.....to cut a long story short...my mate and his Dad had installed a new kitchen ring... They couldn't be bothered to terminate the earth at the board so they snipped them instead!!! No earth whatsoever in the kitchen!!!!!! They couldn't understand what the problem was.... I had to...

Hi all, for the purpose of a PIR form, does anybody have an idea of the following for an old brown Wylex fuse board? BS, Type No. of poles Current rating Thanks Mike

Hi..... I made a stupid mistake of dropping ash on an expensive print i recently bought. I tried to wipe it off and rubbed it into the paper :oops: It's not highly visible but the fact i know it's there is annoying me. Anybody have any ideas on how to remove it? Thanks in advance.

Hi Guys and Gals, just gained my 2381 and DI qual. Not one of these fly by night ones either, it took me almost 2 years of very hard work. A spark i know is letting me get on the tools with him to gain some valuable experience. I contacted CSCS to apply for a card. I was told that i had to go...

When calculating volt drop at design stage for a ring circuit. Can you halve the result for the 2 legs of the ring? For example: 2.5 T & E 20 metres Volt drop = cable length x design current x (mV/A/m) / 1000 Therefore: Volt drop = 20 x 32 x 18 / 1000 = 11.52V voltdrop. Do i...

Just wondering - 2.5/1.5 T & E has a Current Carrying Capacity of 27A when clipped direct (method 1) and is recognised as the standard for ring final circuits, as per OSG. With minimal correction factors this can easily be increased to above 34A. Straight away we have to increase the cable...

Just wondering why Max Zs stated is different, for example: In 7671 Max Zs for say a type 40a breaker is 1.2 In OSG it's stated as 0.96 Does anyone know why and which one to use?

Kettle & toaster on at the same time... MCB buzzing..... Turn the kettle and toaster off and it stops buzzing... They're the plug in type MCBs for the old Wylex CU. Any ideas?

Hello all, i'm installing a couple of PIR 500W floods for a friend. They're going to be independant of eachother and fed from the upstairs ring and conected to SW FCUs, protected by 3a (or maybe 5a) fuses respectively. I'm a developing domestic installer and have recently gained my C&G 2381...

My printer won't print in black, colour only. The black ink cartridge still has plenty of ink left in it. I havn't used the printer for a while so i'm assuming some of the ink has dried up around the outlet stopping the ink getting through. Anybody had this problem before? I can't get out to...

What do people use for their calculations??? I've seen so much contradiction in books. Some say you must use 230v because thats the European harminisation. And some say you must use 240v because thats what it actually is......?? :?

I want ot be able to calculate the distance of a 'short' on ring circuit. How do i change my IR reading of 0.00 megohm to the exact ohms?

6A Type B circuit breaker to BS EN 60898. The 'current for time' in BS7671 is 0.1 to 5 seconds disconnection time for 30A of current. I'm looking at the chart (fig 3.4 on page 199) and the 'time,seconds' line actually goes upto approx 12 secs. I don't understand why? :?

Hi 'Remove all lamps during an insulation resistance test'. My undersatanding is because it will affect the results of the test, not because they are vulnerable to the test voltage unlike electronic devices such as dimmer switches, touch switches etc... Am i right or wrong?

I've been asked to fit a PIR security light for friend. I've been to his house today to make sure there is a decent place to take a feed from and to be honest i'm struggling to find anywhere. The house is full of laminate flooring!!! The only place to take a feed from without ripping up his new...

Does it matter what circuit you take the R1 + R2 measurement to add to Ze for your EFLI? GN3 methods show the R1 + R2 value taken at each ceiling rose in a lighting circuit and to record the circuit extremity reading then add to Ze. I understand this, however, what about R1 + R2 on other...

I have 4 dwarf conifers. One of them is starting to turn a light brown at the edges. The other 3 are perfect. What could this be?

I've had some quotes for Fluke and Megger MFTs. I'm looking at either the Fluke 1652 or the Megger 1552. I'm geting quoted £549 + VAT for the Fluke and £495 + VAT for the Megger. However, they are also on ebay (as new and calibrated) for quite a lot less. My question is - would you trust...