Yes, MC cables are suitable for outdoor provisions. However, they are in compliance with certain site-specific installation practices and environmental conditions. The metal casing provides physical protection to the cable hence it is able to withstand a certain level of mechanical and environmental aggression. However, not in all cases MC cables are suitable for outdoor applications. We must accordingly consider the following factors:
- Weather resistance: Metal-clad cables for outdoor use should have good weather resistance to prevent material deterioration caused by prolonged exposure to sun and rain. Often these cables will have an additional protective layer, such as a weather resistant PVC or LSZH jacket, to enhance their performance over long periods of exposure.
- Corrosion resistance: MC cables should not be used in environments where they may be subject to corrosion or physical damage. Special coatings or materials may be required in corrosive environments.
- Water and Moisture Resistance: Ensure that cable glands and terminations are properly sealed to avoid moisture ingress.
- Installation Standards: The National Electrical Code (NEC) has specific requirements for outdoor installation of MC cables, including protection from physical damage and proper fastening. For direct burial, the cable depth is at least 0.7 m to protect the cable from mechanical damage.
- Use of Rigid Conduit: In some cases, laying MC cables through rigid conduit can provide additional protection against external hazards and rodent intrusion.
Also, The specifications of the manufacturer should also be checked to verify that the cable is approved for outdoor use. Safety and code requirements related to proper installation procedures should always be followed.
