Liquid Tight Flexible Nonmetallic Conduit (LFNC-B)

Nominal Conduit Size	Nominal Conduit Size	Part Number	ID (mm)	OD (mm)	Bending Radius (mm)	Package/Roll (ft/m)	Measurement    (LxWxH mm)	Certificate	Mated With
12	3/8	PLFNCB-3/8	12.29~12.80	17.53~18.03	51	100 / 30.5	380*380*130
16	1/2	PLFNCB-1/2	15.80~16.31	20.83~21.34	72.5	100 / 30.5	380*380*180
21	3/4	PLFNCB-3/4	20.83~21.34	26.16~26.67	108	100 / 30.5	460*460*180
27	1	PLFNCB-1	26.44~27.08	32.77~33.40	165	100 / 30.5	550*550*210
35	1-1/4	PLFNCB-1-1/4	35.05~35.81	41.40~42.16	203	100 / 30.5	720*720*220
41	1-1/2	PLFNCB-1-1/2	40.01~40.64	47.37~48.26	228.5	50 / 15.3	600*600*200
53	2	PLFNCB-2	51.31~51.94	59.44~60.33	282	50 / 15.3	850*850*200

PLFNCB Series Liquid Tight Flexible Nonmetallic Conduit FAQ

General Information

Q1: What is LFNC-B type conduit?

A: LFNC-B (Liquid Tight Flexible Nonmetallic Conduit - Type B) is a UL1660 certified flexible conduit made of thermoplastic PVC with smooth interior and exterior surfaces. The PLFNCB series features embedded reinforcement members for self-support and crush resistance, making it ideal for demanding industrial environments.

Q2: What certifications does the PLFNCB series have?

A: The PLFNCB series is certified to:

• UL 1660 Type B standard

• CSA 22.2 No. 227.2 Type B

• cULus Listed (File No.: E361947)

• RoHS compliant

• IP66 rated (when used with N161 series connectors)

Q3: What sizes are available?

A: The PLFNCB series is available in 7 standard sizes:

• 3/8" (12mm)

• 1/2" (16mm)

• 3/4" (21mm)

• 1" (27mm)

• 1-1/4" (35mm)

• 1-1/2" (41mm)

• 2" (53mm)

All sizes come in standard lengths of 100ft (30.5m) for smaller sizes and 50ft (15.3m) for larger sizes.

Technical Specifications

Q4: What is the operating temperature range?

A: The PLFNCB conduit operates safely in the following conditions:

• Dry environments: -18°C to +80°C (-0.4°F to +176°F)

• Wet environments: Up to 60°C (140°F)

• Oil environments: Up to 70°C (158°F)

Q5: Is the PLFNCB series UV resistant?

A: Yes, the PLFNCB series features built-in UV resistance, making it suitable for both indoor and outdoor installations. The material is specially formulated to resist aging and degradation from sunlight exposure.

Q6: What is the IP rating and what does it mean?

A: When properly installed with N161 series fittings, the PLFNCB conduit achieves IP66 protection rating. This means:

• Complete protection against dust ingress

• Protection against powerful water jets from any direction

• Suitable for outdoor and wet location installations

Q7: Is this conduit fire-resistant?

A: Yes, the PLFNCB series is self-extinguishing and meets UL fire safety requirements. The PVC material will not support combustion once the flame source is removed.

Installation & Compatibility

Q8: Which fittings are compatible with PLFNCB conduit?

A: The PLFNCB series is designed to work with the following liquid tight fitting series:

• P50 Series - Straight type connectors

• P53 Series - 90-degree elbow connectors

• PP60 Series - Quick connect straight type

• PP63 Series - Quick connect 90-degree elbow

• N161 Series - Screw-in type connectors (achieves IP66 rating)

Q9: How do I determine the correct bending radius?

A: Each size has a specified minimum bending radius:

• 3/8": 51mm (2")

• 1/2": 72.5mm (2.85")

• 3/4": 108mm (4.25")

• 1": 165mm (6.5")

• 1-1/4": 203mm (8")

• 1-1/2": 228.5mm (9")

• 2": 282mm (11")

Always maintain these minimum radii to prevent kinking and ensure product longevity.

Q10: Can PLFNCB conduit be used outdoors?

A: Yes, the PLFNCB series is specifically designed for outdoor use with:

• UV resistance for sun exposure

• Weather-resistant PVC material

• IP66 protection (with proper fittings)

• Temperature tolerance from -18°C to +80°C

Applications

Q11: What industries commonly use PLFNCB conduit?

A: The PLFNCB series is widely used in:

• HVAC systems (Heating, Ventilation, and Air Conditioning)

• Power generation plants

• Renewable energy installations (solar, wind)

• Rail and transit systems

• Tunnel infrastructure

• Shipbuilding

• Wastewater treatment facilities

• Industrial automation

• Food processing plants

• Chemical plants

Q12: Is PLFNCB suitable for wet or corrosive environments?

A: Yes, the PLFNCB series excels in challenging environments:

• Oil resistant up to 70°C

• Waterproof with IP66 rating

• Corrosion-resistant PVC material

• Suitable for washdown areas

• Chemical resistant (consult chemical compatibility chart for specific chemicals)

Material & Safety

Q13: Is the PLFNCB conduit environmentally friendly?

A: Yes, the PLFNCB series is:

• RoHS compliant (no hazardous substances)

• Made from recyclable PVC material

• Free from harmful heavy metals

• Manufactured in ISO-certified facilities

Q14: What colors are available?

A: The PLFNCB series is available in two standard colors:

• Grey (most common for industrial applications)

• Black (available upon request)

Custom colors may be available for large orders.

Q15: How flexible is the PLFNCB conduit?

A: The PLFNCB series offers medium flexibility, providing an optimal balance between:

• Easy installation and routing around obstacles

• Structural integrity and crush resistance

• Self-supporting capability without additional support

The embedded reinforcement member ensures the conduit maintains its shape while still allowing for necessary bends.

Ordering & Support

Q16: What is the standard packaging?

A: Standard packaging varies by size:

• Sizes 3/8" to 1-1/4": 100ft (30.5m) per roll

• Sizes 1-1/2" to 2": 50ft (15.3m) per roll

Each roll is packaged in protective cartons with specified dimensions for easy handling and storage.

Q17: How do I ensure NEC code compliance?

A: The PLFNCB series is designed to meet National Electrical Code (NEC) requirements:

• UL1660 listed for liquid tight applications

• Suitable for both wet and dry locations

• Can be used in exposed or concealed installations

• Compatible with NEC-approved fittings and connectors

Always consult local electrical codes and a licensed electrician for specific installation requirements.

Q18: What is the difference between PLFNCB and PLFNCB2 series?

A:

• PLFNCB Series: Standard LFNC-B liquid tight flexible conduit

• PLFNCB2 Series: Non-metallic mechanical protection tubing (NMPT) designed specifically for mechanical protection applications

Both are UL1660 certified but serve different primary purposes.

Q19: Can PLFNCB conduit be used underground?

A: While PLFNCB conduit is waterproof and durable, it is not specifically rated for direct burial applications. For underground installations, consult with our technical team to determine if additional protective measures or alternative products are recommended based on your specific application.

Q20: How do I request technical support or custom solutions?

A: For technical assistance, custom sizing, or project-specific solutions:

• Email: info@flexible86.com

• Phone: +86-563-6636999

• Visit our website contact page for detailed inquiries

• Request product catalogs and technical documentation through our download center

Our engineering team can provide customized solutions to meet your specific application requirements.

Need More Information?

For additional technical specifications, installation guides, or product certifications, please visit our download center or contact our technical support team.