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  1. SJD

    UPS specification for pool pumps

    Background A pool installation uses two single phase pumps to circulate the water (through a boiler, and filtering, dosing etc). The pumps are controlled via contactors in the pump house, plus a remote emergency stop close to the pool. The location is somewhat rural, and prone to power cuts...
  2. SJD

    Any recomendations for outdoor trunking?

    I need some outside containment for about half a dozen or so unsightly cables run outdoor - a mix of black telephone, black security alarm, red (now faded to orange) fire alarm. These are all existing cables, and need tidying up and supporting properly (currently all tied to disintegrating...
  3. SJD

    UK Identification of Crabtree Polestar RCD type

    One of my customers has a TPN board fitted with some Crabtree Polestar MCBs with attached RCDs, and I was wanting to confirm the type of RCD (i.e. AC, A). The RCD modules have either no marking to indicate type, or are marked with the logo for Type AC or Type A. See attached photos. I'm...
  4. SJD

    Surge protection devices for PME supplies?

    I've been installing Type 2 SPDs in consumer units for several years now, and they always come as a pair, connected across L & E, and across N & E. Typically they plug into a holder, sometimes as two separate SPDs (e.g. Hager, with separate E connections), more often now as one combined SPD...
    • SJD
    • Thread
    • devices pme protection supplies surge surge protection
    • Replies: 2
    • Forum: UK Electrical Forum
  5. SJD

    Why is the electrical UNANSWERED THREADS link full of plumbing posts?

    If I click on the "Please help the forum out by replying to UNANSWERED THREADS by clicking here.", for the last couple of days it is infested with lots of plumbing and tiling posts, so much so that it's hard to spot unanswered electrical ones! The link used to be just electrical unanswered posts.
  6. SJD

    Does anyone recognise the make of this grid switch assembly?

    Does anyone recognize the make of this grid switch assembly?
  7. SJD

    Crumbly PVC cable (red only)

    Today on an EICR I came across some old (1960's, I think) PVC lighting cable - twin red/black, no earth - where the red was crumbly. It behaved like old perishing rubber, any bending and it cracks - but it is defintely plastic of some sort. The black was perfectly OK, as was the sheath. Curious...
  8. SJD

    A gas question (sorry)

    Apologies that this is a plumbing question, but I'm sure there will be people here who can answer this. Working in a house today that is in the middle of a total refurb (gutted, rewired, replumbed, etc). The gas supply is currently disconnected inside the house (in the hall), about 2m after the...
  9. SJD

    Armoured Pod Point energy clamp cable?

    I have a customer who is having Pod Point install one of their chargers at a car port, some distance from the house. SWA (10mm2) for the supply will be run to a small consumer unit at the car port, with the Pod Point installed adjacent. A 2-core cable is also required to connect the Pod Point...
  10. SJD

    Code for main switch replaced with RCD

    On a test & inspection today, I came across an older Wylex split load board that had been modified to add RCD protection for all circuits (see photo). The main switch was replaced with an RCD (despite there being room to add the second RCD to the left of the main switch). So a fault (or RCD...
  11. SJD

    Vintage Honeywell panel heater control?

    Just wondering if anyone has come across a Honeywell "Electric Comfort Control" panel, per the attached photo, and knows anything more about it. More for curiosity than anything else. This was in a house I did an EICR for earlier this week. There are two heating 30A ring final circuits...
  12. SJD

    Supplier earth terminal on intake

    The attached photo shows the suppliers head that includes an earth terminal. The incoming supply cable is a single phase plastic sheathed cable containing L & N. The earth terminal is not actually connected to anything (not internally linked). The DNO is SSE. A previous contractor was under the...
  13. SJD

    "Safety Electrical Connection" metal labels

    Does anyone know a source of just the metal labels that are attached at earth clamps? Every time I need to replace a missing label, I'm taking a label from a new clamp, and throwing the clamp away, which seems a bit wasteful. I'd love to buy a bag/box of 50 or 100 of the metal labels.
  14. SJD

    When did sockets require RCD protection?

    Can someone tell me when it became a requirement for sockets (domestic property, use by ordinary persons) to have RCD protection. Or rather, a flat completed (first sold) in Sep 2007, with no RCD protection for anything - would that have complied at the time. I don't have any earlier regs. that...
  15. SJD

    Consumer unit with no isolation of N

    Came across a consumer unit today, where there is no means of isolation of the N, see below. The property is a flat, fed with 4-core SWA plus a separate 16mm2 E, from a TN-C-S supply via a TPN switch fuse in a communal meter cupboard. There are 3 supplies - 24hr, plus 2 off-peak supplies...
  16. SJD

    Solar isolator (to distribution board)

    I don't do PV, so not overly familiar with specific regulations. Yesterday I was changing a consumer unit, and the isolator for the PV was adjacent to the consumer unit. Due to needing a bit more space, I had to move this isolator a few cm and noticed it was single pole, switching L only. A...
  17. SJD

    Gas meter query

    I realise the condition of the gas meter is not relevant to an EICR, but while testing at a consumer unit above the gas meter in the photo, I kept wondering about the inverted-U section of lead pipe between the meter and pipe going into the floor. The pipe is in a position where it is liable to...
  18. SJD

    Single to three phase converter

    One of my customers has a single phase to three phase converter, to power a 3-phase pump. The converter is a rotary type, quite noisy, and recently has been prone to breaking down (three times so far this year). So they are looking for a static or "digital" converter replacement, 230V to 400V...
  19. SJD

    Curious box enclosing meter, with electronics

    Can anyone cast some light on a curious meter I came across today. The old-style meter has a circuit board fitted on top, and the whole lot enclosed with a Perspex cover, with meter seals at each corner to prevent access. See photo below (hopefully). What is this for? I'll try to add a...
  20. SJD

    Lighting wiring in a late 1950's house

    I am working in a late 1950's house - the owner thinks it was built 1957, Bracknell new town. The downstairs lighting is wired in twin & earth (and tests OK). The upstairs lighting is wired in twin, with no earth found at any point (there are now mostly metal light fittings installed). Oh, and...

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