It’s asking for the main switch BS number, which is the 60947-3. Not to do with the fuse. Reply to Brightspark2. OP . Gazthesparky-Arms. Reaction score 128. Jul 30, 2015. Bs 4293 is an rcd old stylee . Reply to gnselectricals. S. shanky887614-Reaction score 3,768. Jul 30, 2015 #8. Naturally you still need to be able to tie the two together. So regarding the BS numbers for. Main cut normally 63a, 80a or maybe 100a how do you know the BS number for EIC. Double pole isolator on consumer unit usually 100a same applies here. mcb’s are 60898. rcd and rcbo’s 61009 and 61008.
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Below is a reference guide for the BS number of various protection devices such as fuses, circuit breakers, RCBOs, etc. typically referenced on test certificates:. RCD Sockets: BS 88: Cartridge Fuses (General purpose) BS EN 60947-3: Main Isolators: BS EN 61008: Main RCDs: BS EN 61009-1: RCBOs: Recent Posts. Modbus Function Codes 23 January 2024;. A common example is RCDs with residual current rating not exceeding 30 mA in a caravan, required by Regulation 721.415.1 of BS 7671, supplied by a socket-outlet or pitch-outlet, which itself is required to be protected by an RCD with residual current rating not exceeding 30 mA by either Regulation 411.3.3 or 708.415.1 of BS 7671:2018+A2:2022.