Building codes mandate the presence of one outdoor receptacle at the front and back of a house, no higher than six and a half feet above the ground. Accessible balconies, porches, patios, or decks must have one receptacle. đź’ˇ Quick Answer: An outdoor electrical junction box is a weatherproof enclosure where electrical wires connect or split, required by code to protect connections from moisture, provide safe access for maintenance, and prevent electrical hazards in exterior applications. What is an Outdoor Electrical. Learn how to install a distribution box safely and correctly. Covers wiring, placement, standards, and expert tips for a compliant setup. Here is a comprehensive overview of NEC Article 225.