Scenario: Commercial TPN distribution board down stream requiring type2/3 protection. Board is at full capacity and breakers discontinued etc. how are people getting around this? is it acceptable to be doubling up in the supply side of the main switch to feed separate enclosure with triple pole...
I am looking for the B1 case size they made between the 1971 (GEC D case type) and when Siemens took over the brand.
I don't have access to the site of the original installation that I am trying to get the panel fixing details used.
Data sheets for these are pre-internet so I am struggling to...
Hi, I have recently had 18 solar panels (390W) fitted to my roof. The system is a GivEnergy. A Gen 1 Hybrid 5kW inverter (Gen2 version could not be sourced!) and a 9.5kWh battery. It all works well (although not much use with just winter sunshine).
My question is: I'm sure I have read that to...
Best way to add RCD protection to specific circuits in an old Siemens DB which I’m told is now obsolete.
Install an additional enclosure adjacent to the DB to hold new RCBOs and feed these from the obsolete MCBs?
Any other ideas?
I am a landlord and my managing estate agent just recently organised an electrician to carry out EICR. Came back as unsatisfactory, no RCD protection on: lights, smoke alarm, door bell and immersion heater. There is RCD protection on sockets and cooker. Electrician suggests changing the...
So as the title says can I use a mcb as the main switch. Basically to keep it short I’ve took a 25mm sub main to power an outbuilding. Mains coming in will be Henley blocked and new tails will go into enclosure with b63a mcb which then feeds 25mm swa to outhouse which contains its own c/u which...
Hi guys, I am rewiring a commercial launderette with 3 phase machinery.
Does the machinery need to be RCD protected being in commando sockets.
The sockets are not accessible to the public and each circuit is being used for a specific machine.
With the price of three phase rcbos the...
TT system, existing three phase fuse board recently installed by another spark which only has single phase circuits terminated into individual RCBOs
Required to install three phase circuits for new equipment, is there a better way of doing this than fitting a 4pole RCD ahead of the main switch...
Evening all,
Pretty straightforward I think. I was led to believe that surge protection needs to be fitted on all additions and alterations including when doing minor works unless the client signs a waiver. Another sparky I work with claims that this does not apply if you are just adding a an...
Qualified electrician has installed Zappi car charger outside house. Grid incoming goes to DNO cutout then to SPD then to meter then to henley block then to RCCB then to SWA cable out wall and to charger mounted on outside wall (about 4m length SWA). I just learnt that RCCB gives no overcurrent...
Let me say from the off that although I'm electrically competent I'll be getting a professional in to do the work. I just like to know the answers before I ask professionals questions!
So I have a 100A single phase domestic supply feeding the house CUs as well as a CU for an EV charger. One of...
Hello engineers. I did EICR in two bed rented flat in a block of flats. There is old plastic fuseboard just above the entry door. There are only bs1361 fuses inside and no RCD. All luminaries are plastic.The board and wiring are in good condition. Any advise on how should i code that?
Hi all,
I am installing a custom sized (15ft X 17Ft) Aluminium pergola in my backyard on a concrete with tiles.
The Aluminium pergola and kitchen are powered from one of the outlet from the house.
Please note, the pergola has inbuilt lights and will be powered from one of the outlet from the...
I was asked to go and take a look at a generator set up by a marquee company yesterday to do some testing.
It was a brand new JCB 65QS with 209hrs on it (58.7kva prime). The generator was fitted with a socket pack from the bus bar with 3 x 16a on 30ma RCBO, 1 x 32/3 on a C curve MCB and a 63/3...
I live in Phnom Penh, Cambodia and people die here regularly by electrocution. There is no earth wiring in the buildings, just live and neutral.
I am a member of an expats forum and the question arises: Will using an RCD device offer any protection at all?
I understand RCD's will go off with...
Hi friendly people,
As you may be aware, I'm a plumber, so quite possibly what I am seeing is correct, though it seems a bit odd to my untrained eyes. Hoping someone might be able to explain a few things to me as I need a bit of reassurance regarding RCD ratings.
I'm currently at a relative's...
My understanding is that a SMPS does not separate, like a SELV transformer, the secondary from the primary. Therefore presumably the equipment supplied cannot be IEC protection class III. So what class is the equipment? For example a laptop with an SMPS, metal body and high resistance...
Hi everyone
I asked my assessor about touch voltage and he was not keen on explaining properly and gave me a rough answer which made me think probably he was not sure himself or was hiding it.
basically my understanding is afcourse that how 30mA RCD works to limit touch voltage to 50V is by...
I would appreciate some opinions on the following situation...
I have been asked to comment on an EICR for a local community resource (church hall used by various groups of all ages).
During an EICR on the TN-C-S installation the testing of a ring final circuit gave R1+R2 and Zs(db) values that...
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