
Resistance to fire and the spread of flame
Material and installation costs
Underground service
Maintenance considerations
Table 10.25 lists many of the codes, standards, and recommended practices for electrical
conduit, tubing, and duct systems. As can be seen from that table, there are many standards
generating organizations that tender documents for various aspects of each of those systems.
Table 10.26 lists some of the raceway standards used in North America and the cable trunking
and ducting systems used in IEC standards. The IEC cable trunking and ducting systems are
surface or underfloor channel raceway similar to NEC Article 386 Surface Meal Race ...