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  1. S

    Supplementary Equipotential Bonding

    I recall being taught that if you measure continuity between the MET and extraneous-conductive parts in a bathroom and, as a rule of thumb, it is either less than 1667 ohms or more than 1 M ohm, then you do not need supplementary equipotential bonding. I think I understand that the 1667 ohm...
  2. S

    Competence

    I'll take that as a "No" then.
  3. S

    Competence

    Thanks Habitual. That is a good answer.
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    Competence

    I have just finished a 5 week wonder course. I an waiting for the results of my 2391 exam which I took a couple or 3 Friday's ago. I have a hypothetical question. I can understand the need to subscribe to an approved competence scheme in order to be able to complete and certify notifiable...
  5. S

    Continuity of neutral conductor

    Thanks Jud. Understand your bit about R1+Rn. Please explain how this verifies votage drop. too tired to think through the logic.
  6. S

    Continuity of neutral conductor

    Whooops didn't know that was needed. Is that in the OSG?
  7. S

    Continuity of neutral conductor

    This won't be the first daft posting of mine, but apparently once you get up to 20 postings you get additional privileges. So please treat me with contempt. When testing a radial circuit you establish continuity of the Line and earth when you measure R1+R2. What test ensures continuity of the...
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    Insulation Resistance Testing Fluorescent Lights Etc

    Guys, guys. It's OK. Richard is quite right to point out that, with the questions I posed, I could not be deemed competent to do a periodic inspection. Richard wasn't to know that I was doing the inspection/testing on my own garage purely to gain experience and that I was proceeding carefully...
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    Insulation Resistance Testing Fluorescent Lights Etc

    Thanks Trev - your preference sounds good to me.
  10. S

    Insulation Resistance Testing Fluorescent Lights Etc

    No problems Dichroic. Thanks for explaining yourself. My job is fixing helciopters. I've been doing it for 32 years in the Royal Navy but they are kicking me out to grass so I have to find a new trade. I'm doing my best.
  11. S

    Insulation Resistance Testing Fluorescent Lights Etc

    Thanks for the reply Dichroic; I'm just trying to learn. I wasn't asking telectrix why to test between L+N to earth I was asking him what to be looking out for when testing between L+N to earth at 250V before doing the test at 500V. In fact you sound knowledgeable and could probably have...
  12. S

    Insulation Resistance Testing Fluorescent Lights Etc

    Thanks for the quick reply Tel. To link L/N do I just disconnect the N and add it to the MCB load side or is their a better way of doing it. What am I looking out for when I first do the test at 250V. I assume I do it at 500V after doing it at 250. Also how do I record the fact that I have...
  13. S

    Insulation Resistance Testing Fluorescent Lights Etc

    The large domestic garage that I wish to test has a single lighting circuit with 6 fluorescent lamps inside and a floodlight with a PIR. It also has neons on each of the 2 way switches for the internal lighting and a neon on the switch for the outside floodlight with PIR. Any tips on how to go...
  14. S

    Metrel MI3000 Easi Plus MFT Standard Test Probes GS38?

    Thank you all for your responses. Anybody any idea if the various schemes get hung up on this at the time of their annual audit.
  15. S

    Metrel MI3000 Easi Plus MFT Standard Test Probes GS38?

    Here goes - Post number 2. First one wasn't too bad (apart from a few jokes about Diversity being a dance act and Susan Boyle (anyway I won't go on)). I have a Metrel MI3000 Easi Plus MFT. The probes look GS38 compliant except they have no inline fuses in the body. GS38 says "should have...
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    Diversity

    Should have been Susan Boyle. Shes was robbed.
  17. S

    Diversity

    Here goes first thread. Go easy on me. I'm trying to suss out the guidance on Diversity contained in the OSG. In particular there are 2 tables A1 (Current demand to be assumed for points of utilisation and current using equipment) and Table A2 (allowances for Diversity). For example in table...
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