Black Arc Flash Stretch Trouser 8.4CAL

The Reece Safety Black Arc Flash Stretch Work Trousers (8.4 cal/cm²) are designed for professionals who need flame-resistant protection along with modern comfort and flexibility.

Made from Modaflame 280g fabric, the flame-resistant features will not weaken with washing. This ensures consistent protection against radiant, convective, and contact heat. With an ATPV of 8.4 cal/cm² and Arc Protection Class 1 certification, these trousers are ideal for lower-level arc-flash environments where a risk assessment indicates Category 1 protection is needed.

The innovative stretch panels, stretch crotch gusset, and pre-bent knees allow for excellent movement during installation, maintenance, and industrial tasks. The side elasticated waistband and adjustable hem improve comfort and fit. Multiple utility pockets provide practical support for on-site work.

For safety managers, these trousers offer CE-CAT III certified protection that meets EN and IEC standards. For engineers and technicians, they provide durability, flexibility, and everyday usability without sacrificing compliance.

Technical Specifications

Arc Flash & Flame Protection

• Arc Rating (ATPV): 8.4 cal/cm² (ASTM F1959/F1959M-12)

• Heat Attenuation Factor (HAF): 75.8%

• ELIM: 6.4 cal/cm² (IEC 61482-1-1)

• IEC 61482-1-2: APC 1 (Arc Protection Class 1)

• IEC 61482-2: Certified

Heat & Flame Standards

• EN ISO 11612: A1+A2, B1, C1, F1

• EN ISO 11611: Class 1 A1+A2

• EN 1149-5: Anti-static protection

• EN 13034: Type PB [6]

Construction & Materials

• Shell Fabric: Modaflame – 60% Modacrylic, 39% Cotton, 1% Carbon Fibre (280g)

• Contrast Fabric: Modaflame Stretch – 60% Modacrylic, 35% Cotton, 4% Elastane, 1% Carbon Fibre

• Inherent FR: Will not diminish with washing

• 100% Metal Free construction

• CE-CAT III

• CE Certified

• 40+ UPF rated fabric blocking 98% of UV rays

Design & Functional Features

• Stretch panelling in key movement areas

• Stretch crotch gusset for maximum flexibility

• Pre-bent knees for improved mobility

• Two-tier knee pad pockets with dual positioning

• Adjustable hem to accommodate all leg lengths

• Side elastic waist for improved comfort

• 8 pockets including easy access cargo pocket and rule pocket

• Heat applied segmented reflective tape

• Reflective trim for visibility

• Bartacked at stress points for durability

• Contrast colouring for modern style

Applications & Suitability

These arc-rated FR trousers are suitable for environments that require flame resistance and lower level arc flash protection.

Typical applications include:

• Electrical installation and maintenance

• LV panel work

• Utilities and infrastructure tasks

• Industrial maintenance operations

• Welding-related environments (Class 1)

The protection level must always be determined through a formal risk assessment and safe systems of work.

Standards & Compliance Explained

The 8.4 cal/cm² ATPV rating confirms arc flash protection under ASTM testing, while the ELIM value of 6.4 cal/cm² under IEC 61482-1-1 provides an additional verified performance level.

APC 1 (IEC 61482-1-2) confirms suitability for defined arc exposure conditions.

EN ISO 11612 and EN ISO 11611 confirm protection against heat, flame and welding hazards. EN 1149-5 provides anti-static performance, and EN 13034 Type PB [6] confirms limited chemical splash protection.

CE-CAT III certification confirms the garment meets the requirements for complex design PPE intended to protect against serious risks.

Protection Design & System Integration

These trousers are designed to be worn as part of a coordinated FR and arc flash PPE system and should be combined with:

• Arc-rated jacket or coverall

• Arc-rated gloves

• Arc-rated face and head protection appropriate to calculated incident energy

Metal-free construction reduces secondary risk in electrical environments.

Safe isolation and structured Lockout Tagout procedures must always be prioritised wherever practicable.

Comfort & Operational Performance

Designed for demanding work environments, these trousers offer:

• Stretch panels and gusset for improved mobility

• Ergonomic pre-bent knees for natural movement

• Adjustable hem and elastic waist for tailored fit

• Breathable yet durable 280g inherent FR fabric

• Segmented reflective tape for flexibility and visibility

This combination of compliance, durability and flexibility supports consistent PPE use in modern electrical and industrial workplaces.

Care, Inspection & Service Life

To maintain protective performance:

• Inspect garment regularly for damage or contamination

• Follow manufacturer washing instructions

• Do not use if fabric integrity is compromised

• Store in a clean, dry environment

Inherent flame resistant properties will not wash out, ensuring long-term protection when maintained correctly.

Product Summary – Certified FR & Arc Protection for Everyday Work

The Reece Safety Black Arc Flash Stretch Work Trousers (8.4 cal/cm²) combine certified arc flash protection, inherent flame resistance and modern stretch comfort.

With comprehensive EN and IEC certifications, CE-CAT III compliance and durable ergonomic construction, they provide a practical and defensible solution for professionals working in lower-level arc flash and heat hazard environments.

Frequently Asked Questions

What does 8.4 cal/cm² mean?

It is the ATPV rating confirming the level of arc flash energy the trousers can withstand under ASTM testing.

What is ELIM 6.4 cal/cm²?

ELIM is an additional arc rating under IEC testing indicating the incident energy level with no break-open.

Are the flame resistant properties permanent?

Yes. The Modaflame fabric has inherent flame resistant qualities that will not diminish with washing.

Are these suitable for high-energy arc flash environments?

No. With APC 1 and an 8.4 cal/cm² rating, they are intended for lower-level arc flash risks as determined by risk assessment.

Are the trousers metal free?

Yes. They are 100% metal free, reducing secondary risk in electrical environments.