A simple calculator to determine correct cable size and circuit breaker choice for final domestic circuits using copper conductors.

All final circuits must be protected by RCD's
Iz=It Ca Cg Ci Cc.  Iz = Cable capacity (Amps) Ca = temperature correction Cg = grouping factor  Ci = cable surrounded by thermal insulation?  Cc = Rating for fuse protection.
Must be =< 11.5 v
If the conductor passes through insulation,choose the length of cable enclosed in insulation.
conductors grouped together.

Under construction,patience.