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Patent US7253356 - Waterproof structure of junction box - Google Patents

Patent US3701451 - Molded electrical junction box - Google Patents

Metal Junction Box Full Automatic Stamping Line Design(Detail Analysis

Sheet Metal Box Assembly Design using NX CAD : Skill-Lync

Metal Junction Box Full Automatic Stamping Line Design(Detail Analysis
The completed setup. An aluminium box is used to house the circuit

Patent US8253016 - Stackable electrical box - Google Patents

Sheet Metal Box : 11 Steps (with Pictures) - Instructables

Box of Metal