Marley Heavy Duty uPVC Orange Conduit features:

• Greater wall thickness than medium duty (as per AS/NZS 2053)
• Greater impact and compression resistance than medium duty
• Full range of sizes and fittings (20mm – 50mm, 4m length).

AS/NZS 3000 Standard Information

Relating to the duty rating of conduit, AS/NZS 3000 states that for an underground installation:

Category A – wiring system is heavy duty conduit, without the need for extra mechanical protection (cable cover);

Category B – wiring system is medium duty conduit and requires the need for extra mechanical protection (cable cover).