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Mineral Insulated Wiring vs Polymeric Alternatives

No Smoke, No Fire is Key to Building Safety

During a fire emergency, it’s critical to reduce the contribution of smoke, flames or fire. However, some fire protection systems, unlike nVent PYROTENAX mineral insulated cable, can actually give off smoke and combustible gasses under fire conditions. 

Some other cables are designed using organic materials for insulation. While these fire proof cables can meet code and are preferred by some contractors, there are also problems that can arise during a fire emergency.

Problems with Polymeric Design 

If these cables are installed in an enclosed environment (such as conduit), they may have insufficient oxygen to allow the burning off of volatile gas.

These gases can attack the standard copper in these cables, causing it to lose most of its strength which can lead to damage and breakage.

nVent PYROTENAX MI cables have a full 30 year warranty. The standard warranty for other cables is usually only up to two years.

 

 

nVent PYROTENAX

Other Cables 

Warranty 

YES (30 Years)

YES  (1 to 2 Years)

Inorganic Construction

YES 

NO

UL/ULC Fire-Rated

YES

YES 

Full Free Air Rated

YES

SOMETIMES

Broad Distribution

YES

YES

Trade/Skill Sensitivity

MEDIUM 

LOW 

Space Required

LOW

MEDIUM 

Ideal for Retrofits 

YES

SOMETIMES

Mechanical Strength (Ability to withstand a blow, falling concrete, etc.) 

HIGH 

MEDIUM 

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An urban electrical contractor chose mineral insulated (MI) 2 hour fire-rated cable to protect this building’s emergency electrical equipment in New York City. The fire resistant wire saves up to 80% of space, compared to conventional conduit and wire systems. See how the entire mineral insulated cable system was installed in this case study.