This is a Wylex RCBO, code: NHXSBS1B32\r\nIt is a Wylex 32 amp, which is a Type B RCBO\r\nMainly for use in all Wylex domestic 'NH' consumer units. The 'NHX' range of RCBOs and MCBs replace the now obsolete 'NSB' range.\r\nWhat is an RCBO?\r\nRCBOs combine the functionality of an RCD, which protect against earth leakage, with that of an MCB which protects against overloads and short circuits.\r\nThe new 17th edition regulations, which dictate that all circuits must be protected against earth leakage, have made the use of RCBOs more prevalent.\r\nYou should use a Wylex RCBO in conjunction with a Wylex consumer unit, ensuring that the RCBO is designed for use within that particular fuse board as not all Wylex RCBOs will fit all Wylex fuse boards.\r\nWylex NSBS RCBOs such as this one, will fit all Wylex NH fuse boards.\r\nThis Wylex 32 amp RCBO comes with a one year guarantee, as do all of our products on this website online at Electricals247.co.uk.