Double Duplex Receptacle Wiring - Round 1-, 2-, and 3-Gang Rectangular Residential – Fully Adjustable Drop-In Brass Covers Stainless Steel Covers Nonmetallic Covers Carlon ® Floor Boxes and Covers. Reduce Emissions at the Source. Outlets and switches can emit strong electric and magnetic fields. Conventional shielding with mumetal is possible, but tricky because it’s hard to make it look good, plus you need access to be able to use the switch/outlet.. The 24-pin double-sided connector is slightly larger than the micro-B connector, with a USB-C port measuring 8.4 millimetres (0.33 in) by 2.6 millimetres (0.10 in).Two kind of connectors exist, female (receptacle) and male (plug).Plugs are found on cables and adapters. Receptacles are.