Module 1 - Lesson 3 Part 5: Application of Different Types of Conductors and Conduits in Various Scenarios

Underground Wiring (buried cables, street lighting)

Required (PVC Schedule 40/80, XHHW RSC, IMC)

Underground Wiring (buried cables, street lighting)

Protects against moisture, soil pressure, corrosion, and physical damage

Embedded in Concrete Walls / Slabs (residential & commercial)

Required (PVC rigid conduit, IMC, RSC)

Embedded in Concrete Walls / Slabs (residential & commercial)

Prevents damage from concrete alkalinity, expansion, and corrosion

Concealed in Ceiling Spaces (offices, commercial spaces)

Required (EMT, flexible conduit, PVC)

Concealed in Ceiling Spaces (offices, commercial spaces)

Organizes wiring and protects from heat and mechanical damage

Surface-Mounted on Walls (industrial spaces, garages)

Required (EMT, IMC, RSC, PVC rigid conduit)

Surface-Mounted on Walls (industrial spaces, garages)

Provides physical protection for exposed wiring

Wet and Damp Locations (bathrooms, kitchens, outdoor lighting)

Required (PVC conduit, IMC, RSC)

Wet and Damp Locations (bathrooms, kitchens, outdoor lighting)

Prevents water ingress and insulation breakdown

Above Drop Ceilings (Non-Plenum)

Usually Not Required (must be supported)

Above Drop Ceilings (Non-Plenum)

Conductors may be run without conduit if properly supported; conduit optional for protection

Inside Electrical Panel Boards & Junction Boxes

Conductors are protected inside enclosures

Exposed Outdoor Wiring (rooftops, solar panels)

Required (PVC Schedule 80, IMC, RSC)

Exposed Outdoor Wiring (rooftops, solar panels)

Protects against UV exposure, rain, and physical damage

Hazardous Locations (gas stations, chemical plants)

Required (RSC with sealing fittings, explosion-proof systems)

Hazardous Locations (gas stations, chemical plants)

Prevents ignition, explosion, and chemical damage

Temporary Electrical Setups (construction sites, events)

Flexible cords allowed for temporary use; must be properly secured

Interior Wiring in Dry Partitions (wood framing, drywall)

Built-in sheathing provides protection; dry locations only

Large Power Distribution

Pre-engineered rigid system for highcurrent distribution

Burbar

Large Power Distribution conductor

Large Power Distribution & Long-Distance Runs

Flexible, space-efficient system ideal for long runs and tight spaces

Cable Bus

Large Power Distribution & Long-Distance Runs conductor