| 49:4.1.1.1.28.4.86 | SUBJGRP 86
| Maintenance Standards | |
| 49:4.1.1.1.28.4.86.1 | SECTION 234.201
| 234.201 Location of plans. | |
| 49:4.1.1.1.28.4.86.2 | SECTION 234.203
| 234.203 Control circuits. | |
| 49:4.1.1.1.28.4.86.3 | SECTION 234.205
| 234.205 Operating characteristics of warning system apparatus. | |
| 49:4.1.1.1.28.4.86.4 | SECTION 234.207
| 234.207 Adjustment, repair, or replacement of component. | |
| 49:4.1.1.1.28.4.86.5 | SECTION 234.209
| 234.209 Interference with normal functioning of system. | |
| 49:4.1.1.1.28.4.86.6 | SECTION 234.211
| 234.211 Security of warning system apparatus. | |
| 49:4.1.1.1.28.4.86.7 | SECTION 234.213
| 234.213 Grounds. | |
| 49:4.1.1.1.28.4.86.8 | SECTION 234.215
| 234.215 Standby power system. | |
| 49:4.1.1.1.28.4.86.9 | SECTION 234.217
| 234.217 Flashing light units. | |
| 49:4.1.1.1.28.4.86.10 | SECTION 234.219
| 234.219 Gate arm lights and light cable. | |
| 49:4.1.1.1.28.4.86.11 | SECTION 234.221
| 234.221 Lamp voltage. | |
| 49:4.1.1.1.28.4.86.12 | SECTION 234.223
| 234.223 Gate arm. | |
| 49:4.1.1.1.28.4.86.13 | SECTION 234.225
| 234.225 Activation of warning system. | |
| 49:4.1.1.1.28.4.86.14 | SECTION 234.227
| 234.227 Train detection apparatus. | |
| 49:4.1.1.1.28.4.86.15 | SECTION 234.229
| 234.229 Shunting sensitivity. | |
| 49:4.1.1.1.28.4.86.16 | SECTION 234.231
| 234.231 Fouling wires. | |
| 49:4.1.1.1.28.4.86.17 | SECTION 234.233
| 234.233 Rail joints. | |
| 49:4.1.1.1.28.4.86.18 | SECTION 234.235
| 234.235 Insulated rail joints. | |
| 49:4.1.1.1.28.4.86.19 | SECTION 234.237
| 234.237 Reverse switch cut-out circuit. | |
| 49:4.1.1.1.28.4.86.20 | SECTION 234.239
| 234.239 Tagging of wires and interference of wires or tags with signal apparatus. | |
| 49:4.1.1.1.28.4.86.21 | SECTION 234.241
| 234.241 Protection of insulated wire; splice in underground wire. | |
| 49:4.1.1.1.28.4.86.22 | SECTION 234.243
| 234.243 Wire on pole line and aerial cable. | |
| 49:4.1.1.1.28.4.86.23 | SECTION 234.245
| 234.245 Signs. | |
| 49:4.1.1.1.28.4.87 | SUBJGRP 87
| Inspections and Tests | |
| 49:4.1.1.1.28.4.87.24 | SECTION 234.247
| 234.247 Purpose of inspections and tests; removal from service of relay or device failing to meet test requirements. | |
| 49:4.1.1.1.28.4.87.25 | SECTION 234.249
| 234.249 Ground tests. | |
| 49:4.1.1.1.28.4.87.26 | SECTION 234.251
| 234.251 Standby power. | |
| 49:4.1.1.1.28.4.87.27 | SECTION 234.253
| 234.253 Flashing light units and lamp voltage. | |
| 49:4.1.1.1.28.4.87.28 | SECTION 234.255
| 234.255 Gate arm and gate mechanism. | |
| 49:4.1.1.1.28.4.87.29 | SECTION 234.257
| 234.257 Warning system operation. | |
| 49:4.1.1.1.28.4.87.30 | SECTION 234.259
| 234.259 Warning time. | |
| 49:4.1.1.1.28.4.87.31 | SECTION 234.261
| 234.261 Highway traffic signal pre-emption. | |
| 49:4.1.1.1.28.4.87.32 | SECTION 234.263
| 234.263 Relays. | |
| 49:4.1.1.1.28.4.87.33 | SECTION 234.265
| 234.265 Timing relays and timing devices. | |
| 49:4.1.1.1.28.4.87.34 | SECTION 234.267
| 234.267 Insulation resistance tests, wires in trunking and cables. | |
| 49:4.1.1.1.28.4.87.35 | SECTION 234.269
| 234.269 Cut-out circuits. | |
| 49:4.1.1.1.28.4.87.36 | SECTION 234.271
| 234.271 Insulated rail joints, bond wires, and track connections. | |
| 49:4.1.1.1.28.4.87.37 | SECTION 234.273
| 234.273 Results of inspections and tests. | |
| 49:4.1.1.1.28.4.88 | SUBJGRP 88
| Requirements for Processor-Based Systems | |
| 49:4.1.1.1.28.4.88.38 | SECTION 234.275
| 234.275 Processor-based systems. | |