1. G

    Understanding the common wire

    Hi, I’ve asked this question to people I work with but have different answers, so thought I’d try here. What is a common wire and what does it do? Thanks.
  2. NDG Elecs

    Free PME upgrades. A common practice now??

    Enquired with NEDL about two possible TT upgrades to PME. I found the screenshot below on their website. It used to cost around 160 quid for the intake to be changed but now it's apparently free. Are other DNOs doing this? Has there been some legislative change?
  3. W

    Two single gang sockets mounted on the same back box. Is this common practice and why?

    Hi there I'm new to the forum, Just wondering if someone could please take a look at the pic attached (hopefully) and tell me in what circumstances it is best practice to wire two 1-gang sockets side by side like this with a set of T&E going to each. I'm not an electrician but was in the...
  4. R

    Smoke alarm in common area of flats?

    Hi, I have a common area above a shop which is a small hallway leading to 2 flats. Each flat has 3 smoke alarms, one behind their front door, kitchen, hallway, these are hard wired back to their consumer unit. The common area has 2 emergency lights installed but i have seen nothing on the...
  5. charlie76

    Common story can someone sign off my extension for me

    I have just been messaged on facebook by someone who has had an extension and for one reason or another the spark (probably the builder) has gone AWOL and they cant get the EIC or part p notification. I am advising them that the best they would get now is an EICR unless they can get the original...
  6. I2C

    AVI (Approved Voltage Indicator) - Common Misconceptions

    Hi Guys! I've worked with a few qualified-electricians recently and I'm shocked with the large-scale misconceptions regarding the proper safe-isolation procedure, particularly concerning the function of an AVI (Approved Voltage Indicator). During the last few weeks I've met several domestic...
  7. H

    Common live wire for three circuits

    Hi, Hoping someone can help me with a lighting circuit challenge. I have an existing two gang switch, with one 2C&E cable for a simple circuit and one 3C&E for a two-way circuit (using conventional 3 control wiring). It's an older property but pretty conventional loop-in loop-out radial...
  8. polo1

    How common is this...

    Not come across this form of supplier's connection before-
  9. JacobCheng

    What are an engineer's most common concerns when selecting instrumentation?

    Hi everyone, I'm Jacob Cheng from China, working in an electronic instrument manufacturer, and this is not a promotion content, I'm here asking for help. As a freshman of marketing promotion in the electronic instrument, I have no idea about what topic will engineers interested in. So, I'm here...
  10. Edtwozeronine

    Correct symbols for physics notation

    Our tutor wants us to use what looks like a Beta symbol for Tesla's, but in our official notes from city and guilds they want us to use a capital B. Another thing that I'm having trouble with is the proportional to symbol. What does it mean mathematically speaking? Is there a button for...
  11. D

    2 gang 2 way, 1 each end of the room, odd behaviour

    I have a bit of an odd situation. At one end of my living room there's a 2 gang switch and a light, at the other end of the living room there's a 3 gang switch and a light. Both switches control both, far end one also controls the light at the top of the stairs.. The light down the far end of...
  12. R

    Connecting nest thermostat to valiant eco tec pro 28

    Afternoon all, Just wanted some clarification about connecting nest to a valiant eco tec pro 28 boiler. They way I have read the installation manual is that you take a l/n 230v to l/n on heatlink . Then terminals 2 and 3 which are the common and call for heat are wired to the rt230v . The link...
  13. S

    Domestic Has wire marking changed - or what do you use.

    When I was an apprentice sparky back in the 1970's and we were rewiring houses or first fixing new houses/flats, I was taught a marking method for T&E that seemed to be common but undocumented throughout the industry. I'm talking specifically about lighting circuits and the loop-in system. At...
  14. S

    3 way lighting circuit question

    I'm trying to sort out some 3 way lighting in a newish build property. The intermediate switch was broken which I replaced. The lights didn't work properly. I noticed the common cable was linked to the neutrals in the box so I endeavoured to rewire everything as someone had obviously had a go...
  15. B

    mains linked smoke detectors within flat entrances

    I have been asked to install mains interconnected smoke detectors in the entrance lobby of flats that are linked together with the common ways detectors. the common way detectors are already installed using the existing lighting circuit. Is it okay to use the supply from the detectors in the...
  16. J

    Wiring thermostat

    Would the wiring on this Sunvic cylinder thermostat Sunvic SA2452 Cylinder Thermostat 3KB Pic 1 be the same as this Sunvic 4KB Pic 2
  17. amlu

    help needed - hive thermostat + vailant boiler connection

    Hello, boilers and thermostats are not my strong point. Can do following the manual, but unfortunately Hive model is not mentioned in the boiler manual... Been doing new electrics for a kitchen refurb, customer brought this new thing and I got a bit stuck on it. Got some pictures from both...
  18. D

    Domestic Light switch change advice

    Hi, I'm currently updating some light switches, I all one gang switches, two of which are two way, and the third is a one way switch. i have purchased some one gang intermediate switches, am I ok using these? As they are different to the switches I have at present..... The ones I have now have...
  19. A

    lighting circuits- Type B or Type C MCB

    What do you guys tend to use Type B MCB for lighting circuits but know that some use Type C even when the loadings are low. What do others prefer and why?
  20. S

    House extension so need to remove and replace FIT installation

    What is the deal with temporarily moving an array to complete building works? No doubt it will be a complete nightmare but hopefully some good experience here? Do they notify or keep quiet?