current carrying capacity

current carrying capacity

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  1. I

    Can anyone give me the answer and source for this question on current carrying capacity

    Hello I just need to know the correct order and a source which shows me that it is that order please When calculating the current carrying capacity Is the correct order Ib ≤ In ≤ It ≤ Iz Or Ib ≤ In ≤ Iz ≤ It Niceone
  2. tony9i9i9i

    6242B Current Carrying Capacity and Volt Drop /A/m

    Hi, go easy on me please, I've just returned to the trade, well I am about to, I received my Gold Card last Thursday. I've been gen'ing up for a couple of weeks going through the regs book, watching some fantastic youtube videos, and working through cable calcs and looking at products and...
  3. S

    UK DNO Concentric cable current carrying capacity

    Had UKPN come out to a property recently to upgrade the main fuse from 60A to 100A but when they arrived they said that the supply cable which he confirmed is a 25sq.mm. CNE aluminium concentric cable (1-phase, burried) for the PME supply is only able to take a 80A fuse. They will have to dig...
  4. J

    EV ultra cable, current carrying capacity

    Hi Doncaster EV ultra cable: Does anyone know what the current capacity of these cables is given particular reference methods? The spec sheet just says 'Max current' 45amps (for the 4mm) but it doesn't state the reference method. The manufacturer does have a very handy cable calculator...
  5. Oldskoolskater

    Wago 221 + box = replacement for 30A junction box?

    Hi, I need to swap out a damaged 30A junction box on an existing ring main circuit and thought I'd replace it with Wago 221 connectors and a Wago box, but got a bit concerned by the multiple ratings on the sides of the connectors. Can I simply swap out an old 30A JB with Wagos? Will it be...
  6. K

    Can anyway help with Radial circuit maximum floor area help?

    Hi everyone I am doing level3 design andI have a circuit to design but I have confusion with radia circuit maximum floor area to understand? I have a socket to feed on the design and floor area according to my knowledge is Length multiply width so in that case it exceeds 75 m square so I am...
  7. NDG Elecs

    Ohm's law and Current Carrying Capacity recap..

    My lecturers were never this engaging....!
  8. F

    Swa current carrying capacity

    hi I've been asked to pick up a job where the previous builder went into liquidation and the property management company is asking me to complete the electrical works, relocate a fuseboard. Everything the previous company has done is exceptionally neat but I'm concerned on the design front...
  9. P

    Cable type ... current carrying capacity

    I'm looking at an install of a double oven cooker ... 11.3kW maximum demand ... and rather than use 10mm T&E for the final connection I have been looking at the CCC tables in Appendix 4 Table 4E2A on page 368 (3rd Amend of 17th) states I should be able to use a cable with 6mm CSA conductors...
  10. C

    Current carrying capacity

    Morning The company that I work for has recently had an electrical inspection carried out. One of the findings consisted of 'ineffective overcurrent protection of cable due to rating of protective device and CSA of cable' Basically a 100A isolator was feeding a 16mm SWA. The SWA conforms to BS...
  11. rustynails

    Exceeding the current carrying capacity

    Current carrying capacity is a figure which is given to us by manufacturers, correct? Now, I've watched those videos of the guy trying to set fire to a piece of 1mm and it takes quite a bit more current to set a light. So for example, if you had a 9kw shower and a 9.5kw instantaneous unvented...
  12. happysteve

    Current carrying capacity of a ring final circuit - grouping factor?

    Eh up :) I'm trying to challenge myself with scenarios where I'm not sure if my interpretation of the calculation rules + regs is correct or not. RFCs are doing my head in. I think I understand most of the theory: - 433.1.204 lists a specific case where a RFC protected by a 30/32A protective...
  13. M

    current carrying capacity

    evening all working away with no regs etc anyone tell me cable size for 200a 3ph head feeding a 6way 3ph ryfield board singles direct from head to db approx. 1m long cheers
  14. V

    Current Carrying Capacity Cables

    Hello, I was just looking for some help with the above subject with looking up the tables for the various protective device and finding the values of C connected with CCCC. I was looking for the rating factor for a BS88 fuse and I found at least 2 different tables the difference being that there...
  15. S

    current carrying capacity

    dont have O.S.G with me can sombody tell me the ccc for 6mm t&e buried in walls (i think i remember its 47A ) am i right
  16. T

    Cable Current carrying capacity

    Why is it that the tables in the Regs for Cable current carrying capacities vary so much from that of a cable manufacturers data sheet, for example a table in the Regs book states a 240mm 4 core XLPE Armoured cable buried will carry 324 amps, but a data sheet for a leading manufacturer states...
  17. M

    current carrying capacity

    can anyone help please, I am testing a new installation for another contractor, lighting circuits are wired in 1.5mm pvc singles in 4inch metal trunking, protected by 16amp type c mcbs, is this overated considering correction factors applied? thanks
  18. G

    current carrying capacity

    Any reason why 6x1.5 mm singles within 20mm plastic cinduit on surface shouldnt be used for a 3kw load. Length if run is about 6 metres. Fused a 13a via sf spur. Thanks
  19. I

    Current Carrying Capacity of cables with different voltages

    Does the current carrying capacity of cables change on what voltage your using?? 2.5mm can carry 27a at 230v would this be the same for 1000v could someone please explaain this whole process please Confused lol Grant p.s i'm a student :)
  20. M

    current carrying capacity

    Can anyone help me out with this? Need to find the max current carrying capacity for 4mm singles over a 10m length in both metal trunking/pipe with a 20A 60898 B Type breaker protecting cct. No thermal insulation at an ambient temp of 30•C. If anyone can help with breakdown of calculations...

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