Open back junction box and method for pre-fab wiring

A method for constructing an open back prefab junction box assembly comprising the steps of:

• providing an open back junction box assembly to a work site, the open back junction box assembly comprising:
• a rectangular open back junction including:
• four sides, opposite ones of the sides being parallel;
• an open front;
• an integrally formed interior ground screw receptacle;
• and
• an open back comprising a single opening
• a plaster ring attached to the open front of the open back junction box;
• an electrical device attached to the plaster ring opposite the open back junction box and extending into the interior of the open back junction box;
• first ends of electrical leads attached to the electrical device;
• free ends of each of the electrical leads residing inside the open back junction box;
• and
• the detachable rear cover plate attachable to the back of the open back junction box over the open back while leaving the free ends of the leads residing inside the junction box and unattached;
• installing the open back junction box assembly at a work site without disassembling the electrical device and the plaster ring from the open back junction box, the installing including the steps of:
• mounting the open back junction box to a framing member;
• connecting a site electrical conduit to the open back junction box working through the open back of the open back junction box;
• working through the open back of the open back junction box to connect site wires carried in the electrical conduit to the second ends of the electrical leads connected to the electrical device attached to the open back junction box;
• and
• attaching the rear cover plate to the back of the open back junction box.

A method for prefab wiring comprising the steps of:

• obtaining an open back junction box assembly comprising:
• an open front for mounting an electrical device and plaster ring, and an open back comprising a single opening about the same size as the open front and opposite the open front for accepting a detachable rear cover plate;
• the plaster ring attached to the open front;
• a mounting bracket sandwiched between the plaster ring and the open front;
• an electrical device attached to the plaster ring;
• a protective cover over a face of the electrical device;
• first ends of electrical leads attached to the electrical device;
• free second ends of each electrical lead;
• and
• a detachable rear cover plate attached to the back of the open back junction box over the open back while leaving the second ends of the leads inside the junction box and unattached;
• installing the junction box assembly at a work site without disassembling the electrical device and the plaster ring from the junction box assembly, the installing including the steps of:
• mounting the junction box assembly to a framing member;
• connecting a site electrical conduit to the open back junction box working through the open back of the open back junction box;
• working through the open back of the open back junction box to connect site wires carried in the electrical conduit to the second ends of the electrical leads connected to the electrical device attached to the junction box;
• and
• attaching the rear cover plate to the back of the open back junction box.