SPD Type 2 vs Type 3: Most Electricians Get This Wrong

What type of SPD should you install when fitting a sub-board, and does the 10 metre rule actually matter? In this video, we break down surge protection devices, including type 2 and type 3 SPDs, upstream vs downstream, and how voltage protection really works. Using BS 7671 Regulation 534, we explain how cable length, impedance and system design affect protection, using Schneider SPDs as real examples, and why an SPD at the origin might not be enough for sensitive equipment. ==AD======== Learn More about The Schneider Electric SPDs used in this video Acti9 iPRD iKQ 👉 https://hub.efixx.co.uk/SchneideriKQ Acti9 iPRD F40r 👉 https://hub.efixx.co.uk/SchneiderF40r Single Phase Version 👉 https://hub.efixx.co.uk/SchneiderSinglePhase =================== Timestamps ⏱️ 00:00 What SPD should you install? 00:22 Common SPD debates explained 00:50 Upstream vs downstream (simple explanation) 01:35 What an SPD actually does 02:20 Voltage protection level (Up) explained 03:00 Type 2 vs Type 3 SPDs 03:50 Combined SPDs and coordination 04:40 The 10 metre rule explained 05:20 What causes voltage rise in cables 06:00 Real-world sub-board example 06:50 So what should you install? 07:10 Final thoughts and takeaway =================== #surgeprotection #surgeprotector #circuitprotection