An agreed limitation of this EICR is that the air circulation unit circuit will not be inspected beyond the switchgear / controls due to no safe means of accessing units on roof of 4 story building. We're discussing how to resolve this. In meantime:
I'm inspecting the air circulation supply at...
Hi,
I recently upgraded my home panel to a Square D qo panel. I had a Siemens FS140 whole home surge protection installed in the first space on a 20 amp double pole breaker. I tend to lose power a lot and get surges from trees on the power lines when it rains.
I have two square D HEPD 50 surge...
Hello everyone,
here I found some Siemens manual (attached) for OVD. As you can see, there wrote that for OVD device which is protected with 125A fuses, 16mm2 wire is enough? How it's possible, In my oppinion 16mm2 wire are too small for 125A current. Any oppinion?
I am in the midst of installing a 800kWp PV System. I have selected and ordered 6 nos. SMA Core 2 (12mppt x 2 strings) inverters which have inbuilt DC and AC SPDs as well as 1 isolator per 3 mppts. Need advise if I should use additional external SPDs / isolators per string. Also is anyone aware...
Looking at a bathroom modification and wouldn't mind some input on the need for RCD protection.
Bathroom has existing light and wall fan. Customer wants downlights fitting and ive also said the fan needs an isolator as it currently doesn't have one. No other electrical circuits in the room. No...
Hi everyone,
I had an EICR certificate done recently and it came back with a C2 for RDC protection on the freezer socket (as below). A picture of the consumer unit is also below. The question I had is what do I need to do to fix it, what is the easiest solution? Does this require the circuit...
Hello everyone
I have a 1996 2 bedroom house which I'm about to let out as I lost my job due to COVID and need to relocate.
The NICEIC electrician I used for my EICR has given me a code C2 for 'no RCD protection to lighting circuits including bathroom lighting'. To put this right, he's...
Just a quick question from a new qualified sparky.
So in 433.1.204 when it says the Iz of the cable must not be less than 20A for a ring final circuit.
Does this include a radial fused spur taken off the ring final?
If you install it in 2.5mm in trunking then the Iz is immediately down to 20A...
In our house the main fuse is rated at 100A maximum. The individual circuits in the consumer unit, if all used simultanuously, add up to much more than 100A. Now I understand this is common practice as it is assumed that not all circuits will be used to their max at the same time (the...
Hi all
question regarding the length of surge protector cables. I have read the reg 534.4.8 that states that the length should not exceed 500mm. Is that for each conductor so every conductor should be 500mm or less. So with a 3 phase surge protector all 3 phases/neutral and earth should not...
Doing a board swap on a HMO property with a TT system later this week and I've been asked to add OCPD for an L1 fire alarm system.
As usual the landlord is being a little cagey with letting me know the other tradesmans details so I can confirm this but I'm on the understanding that a fire alarm...
Hi all I have a few questions about that video.
1. I don't understand why there are two isolators on the tails between the meter and the CU. One is fused and one isn't, so what's the point in the one that isn't?
2. Why would this 'require RCD protection' like the guy in the video says? I...
Hello everyone,
Is there any rule how to determine the size of fuses which will protect surge arrester. I have 3P+N surge arrester, 20kA, and I need to protect him with fuses. But, how to determine the correct size (amper) of those fuses.
tnx
The sparky I am working with always mounts consumer units on a fire retardant board. I am in two minds as to whether this is necessary.
Regulation 421.1.201 states that the enclosure must be manufactured from non-combustible material but doesn't mention what it should be mounted on.
Can anyone...
Hi guys,
Have a job on next week for a friend, my usual industry is maintenance so want to be sure I am checking all the boxes here.
He intially measured the run out at 122m, which would require a 70mm cable due to volt drop, however its changed slightly and I have other queries...
He now...
Hi. Silly Question, as a tester / inspector of an installation. How do i confirm that overload protection is satisfied for an existing circuit, or is it just assumed as long as Coordination (p89 18th Regs) is satisfied and the protective devices is of a EN BS device? Practically, how do i...
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