Underground electrical cable · 10/2 NMWU Direct Burial - cut to length

What this product is for

This NMWU copper cable is used for underground and outdoor power wiring in Canadian installations. It is intended for direct burial and for locations exposed to weather in wet or dry conditions where CSA NMWU cable is specified.

Use for

Use for underground runs to detached structures, outdoor branch circuits, landscape power feeds, and exterior lighting circuits. This 10 AWG 2-conductor with ground format is commonly selected where a 30 A circuit may be required, subject to conductor ampacity, termination ratings, installation method, and local electrical code.

Avoid for

Avoid using this cable where a 600 V cable is required, where higher temperature conductor ratings are needed, or where the installation conditions fall outside CSA NMWU application rules. Do not substitute it for indoor dry-location Loomex or NMD90 where those cable types are specifically required.

Best for

Best for electricians and contractors needing a copper underground cable for direct burial in residential or light commercial outdoor work. It is a practical choice when you need a sunlight-, moisture-, and fungus-resistant jacket for exposed outdoor sections.

Installed in

Installed in trenches, below grade direct burial runs, and outdoor exposed areas. Approximate overall dimensions are 0.282 x 0.585 in (7.2 x 14.9 mm), which can help when planning entry points and routing.

Why this product exists

NMWU cable exists to provide a non-metallic sheathed copper cable option for underground and weather-exposed installations in Canada. Compared with indoor-only cable types, it is built with a PVC jacket designed for sunlight, moisture, and fungus resistance.

Compared with similar products

Compared with NMD90 or Loomex used indoors, NMWU is intended for direct burial and outdoor exposure. Compared with larger underground cable sizes, 10 AWG 2-conductor with ground is typically chosen for smaller feeders or branch circuits where load and voltage drop allow. As a rule of thumb, longer runs may require upsizing to manage voltage drop. Actual performance depends on load, run length, installation conditions, and local electrical code.

Specifications

• Cable type: NMWU copper
• Conductor size: 10 AWG
• Conductors: 2 insulated conductors plus ground
• Ground size: 12 AWG copper bonding wire
• Conductor construction: solid copper
• Voltage rating: 300 V
• Maximum allowable conductor temperature: 60 degC (140 degF)
• Minimum recommended installation temperature: -40 degC (-40 degF) for 2-conductor cable, with manufacturer handling guidance
• Jacket: PVC, sunlight-, moisture-, and fungus-resistant
• Application: direct burial, underground installation, outdoor wet or dry locations
• Approximate overall dimensions: 0.282 x 0.585 in (7.2 x 14.9 mm)
• Standards: CSA C22.2 No. 48, FT1 flame test