quick question by a new to the trade

[kdev]

Hello all,
currently in training so be gentle if this is obvious....i have come across a consumer unit where the sockets are all on one fuse ( 1970s) there are 4 2.5 mm conductors. I assumed it had been wired as two loops onto one fuse however all four line conductors have continuity to each other??
I am just starting to learn testing, and am assuming this is not normal, maybe an interconnect?
Any advice appreciated. many thanks!

 

[telectrix]

probably additions over several years. CU too small so they doubled up. to check continuity between circuits, you need to diss. both line and N conductors from the CU first.

 

[Octopus]

Without testing we are all guessing

It could be 4 radials , 2 rings, or 1 ring and 2 radials ......