Building Entrance Terminals Modules Other These heavy gauge steel BIX block building entrance terminals feature the BIX (MOX) brand connector and external ground connectors that accept 6 to 14 gauge ground wire. The BIX connector can terminate 22-26 gauge wire and accepts the QTBIX22A test shoe. This line is designed to exceed the requirements set forth in Underwriters Laboratories’ UL497 (UL, cUL) and the Canadian Standards Association (CSA). The units have an internal fuse link and use industry standard 5-pin protection modules which are sold separately. Models 2100B-100, 2100SB-100 and 2100BN-100 can be wall or rack mounted.