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common

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  1. J

    Common grounding in audio cables? Theory suggests yes?

    Hi guys! I am currently studying a BA (Hons) in Music Production, and I have decided to build a new stage box to go on stage, to route microphones cables and power supplies from the stage to the original inlets underneath the stage. I would like to use a 19-pin Socapex cable to make the...
  2. 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...
  3. 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...
  4. 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...
  5. C

    The most common way to call harness- and component-side connectors

    Hi, I'm writing a troubleshooting manual for an electric vehicle. Its electrical system consists of many electrical components such as sensors and encoders, and all the components interconnect by the main harness. Sometimes, I need to guide the audience to put a multimeter on connector pins...
  6. polo1

    How common is this...

    Not come across this form of supplier's connection before-
  7. J

    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...
  8. 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...
  9. 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...
  10. 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...
  11. S

    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...
  12. H

    UPS connection common neutral supply & load

    Hi Maybe im over thinking this but need to connect a UPS system to a control panel, the problem is the ccts i want to connect to the UPS are split & all the neutrals are all connected to a single busbar connection unit at the moment which is all normal, but i need to connect a UPS to power...
  13. G

    PV system not generating, common ideas

    HI all, put a PV system in 4 yrs ago, business didn't take off due to the tarrif drop fiasco , so out of the loop on these things i've popped round tonight just to see if it was something simple but its not, going back to investigate more Saturday. was just wondering if there is something...
  14. telectrix

    Common Sense Coming from an American

    enjoy.. https://www.youtube.com/watch?v=hkhUivqzWv0
  15. 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...
  16. 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...
  17. 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
  18. 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...
  19. A

    4 submains with one common CPC

    I have a query. 4 distribution boards, each fed by 25mm2 double insulated tails (approx 30m away) in a roof void. Only 1 16mm2 earthing conductor for all 4 submains. The earthing conductor is then connected at the first board and looped to the other three boards. Is this acceptable? I thought BS...
  20. D

    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...

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