The type 15 plug and socket has 3 round pins of 4 mm diameter, plus 2 flat pins (for L2 and L3). It is designed for three phase applications and is rated at 10 A, 250 V/440 V. For example, the colour-coding of wires may. 3-pin plugs and sockets: These are used for single-phase AC power supply, with one pin for live, one for neutral and one for earth. 5-pin plugs and. At Electrical4less, we focus on the three most essential IEC 60309 colour options used across UK industries: Commonly used on construction sites, these connectors support the UK's standard 110V site power for portable tools and lighting. NEMA standards use the Phase designations X, Y and Z. (1) Power distribution from the primary main distribution board (distribution cabinet) to secondary distribution boards can be branched; that is, one main distribution board may supply power via multiple branch circuits to several secondary distribution boards. (2) Similarly, power distribution.
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