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  1. D

    RCD for TT system

    Hi all, I have just read an old periodic report that has highlighted a TT system that has an RCD main switch mounted in a non insulated enclosure (metal) as a category 2. Does it state anywhere in the reg that the RCD should be in an insulated (plastic) enclosure. I've had a look but cant find...
  2. K

    gas and water testing

    hi guys hope yous can help, doing periodics for a council, i cant get access to the main water and gas bonds in the house, laminated flooring, boxing ins etc, what do i put on the certificates? its niceic forms, was thinking putting in limitations at the tic boxes and putting reasons in at the...
  3. P

    Voltage drop and ZS - Some thoughts

    Hi all The scenario: Garden power supply to be taken from a 13am FCU spurred from a RFC. It then goes off to a double socket and lighting etc. No grief there. (RCD protection on RFC BTW!) The spur is protected by a BS1363 13amp plug top fuse. Which ZS max do we use? Is it the ZS from the 13...
  4. R

    PIR on Caravan's help please . . .

    Hi guys, am new to the forum although I have been reading threads on it for a while. I am looking for a little help on the job I am currently doing. I am currently carrying out PIR's for a number of caravans on a large park, but am getting pretty puzzled when coming to fill in the 'SUPPLY...
  5. 2

    what classes as been connected directly to the origin?

    Hi Just a quick question relating to filling out niceic test certs. Is a d.b deemed to be connected directly to the origin of an installation when supplied via an rccb? Am I right in thinking that if over current protection to any d.b is provided by the main distributors fuse then it is classed...
  6. H

    large shop with an rcd at the origin

    ......Set at 500ma. Now this supplies several dist boards serving quite a few circuits. My question is do I install individual rcds set at 30ma at every board or to reduce incovenience when a circuit trips do I put all circuits on rcbo's( think of the expense of over 100 circuits). A lot of...
  7. J

    mcb's at origin

    i install street lighting, i use lucy cut outs at the origin then mcb's feeding my 6 flood lights at the top, they are 3 phase, a new lad in are work has been getting rid of the lucy cut outs and putting single phase mcb's in at the origin, i think that is wrong. what do you think
  8. S

    suppliers kmf and testing

    Wonder what you guys think of testing at the suppliers KMF 80. I am not sure it is necessary, as it cant be isolated and is still live when the cover is removed to access the terminals. I dont like working live, but it is the origin of the supply..... a wee bit of a conflict here. How do you...
  9. W

    Final Circuit to Origin?

    Hello people, My company installs a lot of circuits in larger commercial/industrial buildings, we tend to have a lot of trouble gaining access to every sub-main leading to a consumer unit which supplies our new circuit. My NICEIC inspector was adamant that the installation must be tested all...
  10. E

    Ze at origin tns

    0.01ohms? Does this comply? Tns system. Unsure because, usually given as 0.8ohms, previous test cert gives 0.08 ohms. Not sure if previous spark rang supplier or just put 0.08 anyway. Is this value ok anyhow?
  11. P

    RCD splitting question

    Hey guys!! Can anyone tell me if I'm wrong. I've run a 16mm Twin from mains to a 2 storey extension where I'm putting in a new board.2 rings 2 lights and smokes I have to put in an RCD at the mains end so I was gonna put the new board on a 100a Main SW. Is that Ok or do I have to still put in a...
  12. K

    Zs too high at distribution boards

    The boards i tested were none RCD protected, with 60A sub main protective device. Is the easiest way to solve the problem to install a main RCD incomer, eg 63A, 30mA at each DB? any advise?
  13. L

    Short Circuit Capacity

    Hi Guys Any advice would be much appreciated! I have tested a property that has a PFC greater than the short circuit capacity of the mcb's protecting the final circuits, the PFC is 7.9KA and the 60898 mcb's 6KA. The property is protected at origin with a 1361 type b fuse 16.5KA. Under the...
  14. T

    Earth Fault Loop Impedance Ze test at origin

    Hi, I have a my am2 practical testing exam next week and I'm confused about the earth loop impedance test. The centre use a three lead instrument, I just want to know if this is right. Connect the third lead to the neutral bar, and connect one lead to the earth bar Then measure over the...
  15. D

    How to do an RCD test at origin?

    Hi, I've been trying to test an RCD at origin but can't make it trip! It will trip if I go to the end of the circuit. I've got a Megger 1552, connecting it accross the top of the RCD and then the black cable to the earth bar. I put the Megger on Auto RCD but I just get >400ms. Any help much...
  16. J

    distribution circuit at origin (meter tails)

    On the EIC page 3 it says to record details of these on first line, would that just be on the circuit details side of the form? or do you have to fill in test results for tails too?
  17. DiscoDave

    Particulars of the installation at origin?

    I'm about to start some work on a detached garage. Sockets lights etc etc. From the supply head there is a 63A switch fuse, that takes a set of 25mm tails to the board which is situated about 4m away. From the board it goes in 16mm 3c SWA to the garage where it is terminated into a four way...
  18. V

    Testing limitations

    I cant do Ze because I can not turn off the power,it has to stay running 24/7, what do I do???
  19. ses

    Certificate for 2nd dboard tt supply

    I have just changed a mini d/board in a garage (db2) and have installed an earth rod as the supply at origin(db1) is tnc-s and there is awater service in the garage. Bonded the water and installed an earth rod from new mini d/board. Now i have easycert software and for the origin and supply...
  20. J

    Pfc testing

    Hi I know how to test PFC at the origin of the Installation but how do you test PFC at other points in the installation does this mean on the individual circuits like the ends of them, and what about the earthing conductor is it disconnected or connected.and if disconnected why?

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