type c

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  1. Msitekkie

    OK to swap B MCB for Type C or does my C load have to go on it's own breaker?

    I have a customer who want's me to fit a 3Kw Patio heaterto a garage. - I believe this requires a Type C breaker. There is limited space in the board, so wanted to get peoples views on whether it's OK to swap an existing B type (used for sockets) for the C type, or whether the C type load needs...
  2. W

    EICR code - type C breakers with undersized CPC

    Mainly on commercial lighting with twin and earth 1.5mm or 1mm on 6A and 10A type C breakers Im sure there was a table in bs7671 requiring larger CPC sizes for type C breakers than supplied with twin and earth, hence why people use fb200 or singles etc I guess it must be restrictEd by let...
  3. D

    UK MCB type confusion.

    I've noticed at my grandparents house that all the MCB's in the consumer unit are all type C, every single one of them. Including the ring final circuits and lighting (there's no fluorescent lights in the house at all). The house isn't that old as well. Maybe about 16 years old. With me being a...
  4. Marcus Vaughan

    Type C MCB needed for EV Charging?

    Hi all, I've not a lot of experience with EV but was called to a local job to investigate a loss of power to a 32amp 7.2KW EV charger. It turned out the 32A MCB (Type B) had failed, and would not even operate when completely removed from the board. I happened to have a matching Contactum B32...
  5. Gavin John Hyde

    Type C or B rcbo? & Results on a CU change certificate

    Been to quote for a job this morning, The house has 2 CU's one is eco7 for 5 storage heaters, the other was upgraded in 2009 and all wylex rcbo's. Meter tails, bonding all up to scratch, the DNO upgraded the cutout to PME in 2009 with the previous work. The owner is going to have the heaters...
  6. John Lundrigan

    I'm confused about Type C Breaker Disconnection Times

    Hi All, When I consult Table 41.3 for a Type C Breaker rated 16A I see s max Zs of 1.37 Ohms. However this value is defined for both a 0.4s AND 5s disconnection time. This is obviously correct so I am missing something. Fig 3A5 also shows the table 0.1s to 5s. Can anyone explain please...
  7. DomB78

    TYPE C RCBO Fails to trip on 1 Times RCD Test

    Hi Can anyone help ? Recently fitted 2 separate Eaton 32a Type C RCBO, on the RCD test it fails to trip on the 1 times test and gives result as >400ms. It trips fine on 5 times test in 7.1ms. Using Megger 1552. They are fitted on 2 new 6m2 radial circuits with Blue commando sockets. IR results...
  8. S

    Max Zs on rcbo type c 32a 1667 or 0.54??

    Has anyone any views on max Zs for say a type c 32a rcbo at 80% is 0.54 and 100% 0.68. I am currently testing a collage and all ring circuits are type c and I am exceeding 0.54 and 0.68 this is a TNCS system so to my knowledge table 41.5 in regs which tells us 1667 for 32a rcbo for TT systems...
  9. 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?
    • atm84
    • Thread
    • because circuit circuits common inrush lighting mcb type b type c type c mcb
    • Replies: 16
    • Forum: UK Electrical Forum
  10. D

    Air conditioning unit on a type C mcb

    Hey guys The air con unit has a start current of 83amps and a running load of 13amps. It's currently wired in 6mm which takes 47amps which is obviously lower than 83amps, would you say this is OK Aslong as the mcb protects the cable. Saying that if I used a 20amp type C mcb it would take...
    • Davey1988
    • Thread
    • mcb type c type c mcb unit
    • Replies: 30
    • Forum: UK Electrical Forum
  11. P

    Rated short circuit capacity of a BS88-3 type C fuse?

    What is the rated short-circuit capacity of a BS88-3 type C fuse? They are typically manufactured to 80kA but what does the BS say?
  12. W

    MCB tripping time for 153.37A Short circuit L-N fault for 16A Type C MCB??

    I'm a qualified spark but studying building services engineering at uni and just need a little bit of advice to see if I'm going wrong. Trying to answer a question where we have a 16A Type B MCB, and a short circuit fault current of 153.37A. From fig 3.4 of regs we can see that for a fault...
    • walberto
    • Thread
    • circuit fault mcb short short circuit time tripping type c type c mcb
    • Replies: 8
    • Forum: UK Electrical Forum
  13. S

    type c mcb on domestic hager board

    hi all, Domestic installation question I have an Hager split board, left hand controlled by an RCD. 100 A Main switch RCD 63a, with upstairs and downstairs sockets 32a, 1 x 16a sockets all type C, there is also 1 x type B 20a MTN 120 for sockets. The type B has two T&E cables, both ending...
    • Simon Torr
    • Thread
    • board domestic hager mcb type c type c mcb
    • Replies: 6
    • Forum: UK Electrical Forum
  14. D

    Type C Mcb

    Hi Folks, I have been asked to quote for an armoured supply down a garden to a hot tub, the manufacturers specify a type c mcb and the client wishes a separate twin socket outlet at the same position down the garden, my question is, can I run a normal twin s/s/o from a type c or do I need a...
  15. H

    type C Circuit breaker

    what is the answer to this question please? A 16amp Type C CB used to protect a three phase reduced low voltage circuit is subject to a maximum Zs value of? How do I work this out?
    • hsharp
    • Thread
    • breaker circuit circuit breaker type c
    • Replies: 31
    • Forum: UK Electrical Forum
  16. C

    (MIDLANDS) For Sale: 40 RCBO's - Hager Type C & Eaton MEM type B.

    Having a clear out of excess stock after a few jobs have ended as I have no room for them, and wont be using them again soon. All stuff is brand new & boxed. Boxes may be a little scuffed in places where they have been on site. I have for sale: RCBOS (all 30mA): Hager - 10x ADC110 10A Type C...
    • Chris Ward
    • Thread
    • eaton for sale hager midlands rcbo rcbo's sale type b type c
    • Replies: 0
    • Forum: For Sale and Wanted Forum
  17. D

    type C or B mcb

    Can anyone let me know Reason for type C in industrial office area
  18. J

    MEM memshield2 Type C 32A MCBs

    Type C 32A MEM SHEILD MCB FOR SALE £3 CONTACT ME FOR MORE INFO JAMES [email protected]
  19. S

    Calculation of Max EFLI readings for type C MCCB'S

    When calculating the max earth fault loop impedance of a 3 phase MCCB that you use the nominal voltage ie in this case it is on a 60Hz system (120 / 208V ) and a 350A MCCB : therefore 208 / (350 x 10 (C type)) = 0.05 ohms Therefore Zs is required to be equal or lower than this in order for the...
  20. M

    Type c RCBO

    Hi all I have recently obtained some type c RCBOs, can anyone tell me if these would be ok to use in a domestic consumer unit, they are wylex and MK. Not sure if they would fit. Thanks in advance.

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