Electrical junction box for a vehicle

An electrical junction box comprising:

• (i) a casing;
• (ii) a connector circuit having at least one connector circuit insulation substrate and a plurality of first bus bars fixed on said connector circuit insulation substrate, said first bus bars being arranged to provide electrical connection to electrical connectors in use, and welding portions of said first bus bars projecting from the connector circuit insulation substrate;
• (iii) a fuse circuit having at least one fuse circuit insulation substrate, which is discrete from said connector circuit, and a plurality of second bus bars fixed on said fuse circuit insulation substrate, said second bus bars being arranged to provide electrical connection to fuses in use, and welding portions of said second bus bars projecting from the fuse circuit insulation substrate;
• and
• (iv) a relay circuit having at least one relay circuit insulation substrate which is discrete from said connector circuit, and a plurality of third bus bars fixed on said relay circuit insulation substrate, said third bus bars being arranged to provide electrical connection to relays in use, and welding portions of said third bus bars projecting from the relay circuit insulation substrate;
• (v) wherein at least one of said second bus bars is joined to one of said first bus bars by welded connections formed by welding together of at least a portion of the welding portions of the first bus bars to corresponding welding portions of the second bus bars:
• and wherein at least one of said third bus bars is joined to one of said first bus bars by welded connections formed by welding together of at least a portion of the welding portions of the first bus bars to corresponding welding portions of the third bus bars;
• and
• (vi) wherein at at least one of said welded connections, said junction box is provided with a protection structure which receives said welding portions of the at least one of said welded connections and presses said welding portions of the at least one of said welded connections towards each other.