Product locator Product range overview Compliance with RoHS Directive 2002/95/EC What transients are and why you need protection Risk assessment Protection benefits When and where to protect How to get effective protection Location categories and exposure levels explained Installation advice What every Furse protector gives you Direct sales Worldwide distribution Request literature Enquiry form         Data communication, signal and telephone lines Following on from work by the ITU, BS 6651 defines a single location category for data communication, signal and telephone line protectors. This is because transient overvoltages on data communication, signal and telephone lines are not significantly attenuated by the cable. Regardless of where protectors are installed in the building, the worst case will be similar. Consequently, all data communication, signal and telephone line protectors fall within Location Category C.   1 | 2 | 3 | 4