49 C.F.R. § 234.241 Protection of insulated wire; splice in underground wire.
Title 49 - Transportation
Insulated wire shall be protected from mechanical injury. The insulation shall not be punctured for test purposes. A splice in underground wire shall have insulation resistance at least equal to that of the wire spliced.
Title 49: Transportation
PART 234—GRADE CROSSING SIGNAL SYSTEM SAFETY
Subpart D—Maintenance, Inspection, and Testing
Maintenance Standards
§ 234.241 Protection of insulated wire; splice in underground wire.
