Project Help

[OxiaUK]

Hi,

I am creating a project that will control some pumps via a microcontroler with relays etc. At the moment it is fed via some 1.5mm 3 core flex and a 13a plug, it then goes in to the common side of each relay and out to a fuse for each output. from there it then goes to some 0.75mm 3 core flex with a 1 gang trailing socket attatched.

I am trying to shrink the project down in size and wanted to know if I wired everything in 1.5mm flex (to relay and from relays to sockets) then could i do away with the output fuse for each relay?

each item plugged in to the trainling sockets will have its own plug and fuse.

Thanks

 

[EFLImpudence]

If I understand correctly, the answer is yes - but...

...if the fuses in the plugs (which are plugged into the trailing sockets) are 5A or less then those fuses will also protect the 0.75mm² flexes from the relays so you don't need the fuses for each output anyway.

Fuses do not need to be at the supply end of cables.

 

[donrkebab]

How important are these pumps! At the moment, and with your proposal, you run the risk of losing power to everything. If that is acceptable,the only circuit protection required would be a 5A fuse in the 13A plug.