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Cpc

MrJack96
Is it acceptable practice to crimp a cpc with through crimps to extend it?
  • 0
    In what context?  Fusebox, socket-box, or within a length of wire pulled into conduit, etc?  Insulated conductor, or just a sleeved end?  I leave the regulations aspect to others who'd know better to comment on. Just based on what I'd feel happy with, I'd not want to have this within a conduit and yet I'd tolerate it in e.g. a box where it's well done, inspectable, not strained, and avoids changing an awkward run of cable.
  • 0
    Nathaniel:

    In what context?  Fusebox, socket-box, or within a length of wire pulled into conduit, etc?  Insulated conductor, or just a sleeved end?  I leave the regulations aspect to others who'd know better to comment on. Just based on what I'd feel happy with, I'd not want to have this within a conduit and yet I'd tolerate it in e.g. a box where it's well done, inspectable, not strained, and avoids changing an awkward run of cable. 


    Agreed - BS 7671 requires connections to be accessible for inspection unless they are classed as maintenance free


  • 0
    MrJack96:

    Is it acceptable practice to crimp a cpc with through crimps to extend it? 


    526.3 "Every connection shall be accessible for inspection, testing and maintenance, except for the following:

    …

    (iv) A joint made by welding, soldering, brazing or appropriate compression tool.

    …"


  • 0
    Is it acceptable practice to crimp a cpc with through crimps to extend it?

    It depends on the detail - if the crimp is suitable for the particular size and type (e.g. stranding) of the conductor, and crimped according to the manufacturer's instructions then yes. If it's more of the "automotive" type crimps on a solid c.p.c. done with a pair of cheap "pliers" type crimp tool, then probably not.

       - Andy.
  • 0
    If the joint for the CPC is made accessible, I would use a suitably sized proprietary crimp for the core/cable; after all there should be little current flowing under normal useage, but when current does flow under a fault, the connection should be reliable.. A tug test and/or continuity test of the joint should also be made. 


    Jaymack
  • 0
    And also to consider, is the crimp actually suitable for the conductor arrangement (Class 1 solid, Class 2 stranded, Class 3 flexible or Class 4 extra-flexible)?

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