Bs7671 is not a prescriptive standard - it does not tell you how to do anything at all pretty much. (OK that is a bit sweeping, but you get the idea I hope)
Instead it sets technical aims - e.g. terminals shall be rated for the load they are expected to supply.
How you achieve that , indeed if you have junction boxes at all, or make the joints at the accessories instead, is entirely a matter for you.
It is not in that sense a wiring code.
The 'onsite guide' is closer to a code, as containing many tried and tested recipes to reliably meet the regs in most cases.
Bs7671 is not a prescriptive standard - it does not tell you how to do anything at all pretty much. (OK that is a bit sweeping, but you get the idea I hope)
Instead it sets technical aims - e.g. terminals shall be rated for the load they are expected to supply.
How you achieve that , indeed if you have junction boxes at all, or make the joints at the accessories instead, is entirely a matter for you.
It is not in that sense a wiring code.
The 'onsite guide' is closer to a code, as containing many tried and tested recipes to reliably meet the regs in most cases.
