The Ryefield TP42AVS100 is a 42-way vertical Ryefield board with 100A fuse units. It is used to provide separate circuit protection for each dwelling in a multiple setting. Suitable for up to 42 flats, this board allows 42 single ways using the 100A fuses. The standard main brass clamps are adjustable, accepting 25mm to 120mm stranded conductors. For the cable sizes, the maximum size for this board is 125mm per cable. Ryefield TP42AVS100