WebTypes of Earthing Systems; ... August 2024 - Added some manufacturers BS 3871 Type 4 MCB devices to the Max Zs Values calculator Date: March 2024 - Added a Call the local DNO function - Added a new news feed - Some UI tweaks - Some optimizations Date: December 2024 - Added: Copper Clad Aluminium Cable Rating Table - Added: MCCB … Web• Fuses to BS 3036, BS 1362 and BS 88 • Circuit breakers types B and C to B S EN 60898 • RCBOs to BS EN 61009-1 • Circuit breakers to BS 60947-2 • MCBs to BS 3871, types 1, 2 and 3 NOTE: The cross-sectional area of a conductor may be reduced for fused spurs, which are discussed below. Ring circuits
max Zs for BS3871 type B mcb Screwfix Community Forum
WebJun 15, 2005 · SLIPSHOD SLAPDASH LTD New Member. Just looked in my old yellow reg book , Type 1 miniture circuit breakers to BS 3871 .Its max Zs is 2 for a 30a for 0.4sec dis time reg 413-02-11 and 5sec dis time for reg 313-02 … WebBS 3871& BSEN 60898: 6A – 40A Type 2 (old style), Short circuit protection is 3kA. BSEN 60898 Type B (new style), Short circuit protection is 3kA . Consumer Units artas taschenlampen
Legacy Circuit Breakers: What Value? - Professional …
WebAug 16, 2011 · Ian, BS 3871 is a withdrawn standard replaced by BS EN 60898 and therefore there is no design information in the 17th BRB and BGB or their OSGs. Strictly … WebFeb 24, 2011 · Feb 21, 2011. #13. bs3036 fuses are as followed2ka 5-30amp type sa2. 4ka 30+ type sa4. the push button bs3871 mcbs are/maybe rated at 1ka and they only need to be changed if your ka exceeds this, there is nothing wrong with them apart from they dont always reset and you have to tap them to get the trip button to come back out. regards … WebThe fault current is in excess of X times of multiples quoted for the type of MCB. So as per the regulations a trip time less than 0.1s (instantaneous) should be proved with energy let through. ... if these are the old black cased loadmasters to BS 3871, they have an M3 (ie 3kA rating) and for all sizes to 70A, they have A2s values of 10,000 ... artasmedia