Galvanized Steel Flexible Metal Conduit (Reduced Wall/Greenfield)

Technical Specifications

Below are the complete technical specifications for the PRWG Series Galvanized Steel Flexible Metal Conduit. All measurements comply with UL1 standards and are suitable for use with UL 514B listed fittings. Select the appropriate size based on your wire gauge and application requirements:

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
-	5/16	PXRWG-5/16	7.92~8.60	11.94~12.95	50	100 / 30.5	320*320*150
12	3/8	PRWG-3/8	9.52~9.96	14.22~15.49	50	100 / 30.5	320*320*150
16	1/2	PRWG-1/2	15.88~16.38	21.84~23.37	75	100 / 30.5	380*380*150
-	9/16	PXRWG-9/16	13.70~14.40	18.00~18.80	75	100 / 30.5	-
21	3/4	PRWG-3/4	20.62~21.21	26.54~28.07	100	100 / 30.5	450*450*180
27	1	PRWG-1	25.40~26.42	33.02~35.05	125	100 / 30.5	550*550*220
35	1-1/4	PRWG-1-1/4	31.75~33.02	39.37~41.40	160	50 / 15.3	500*500*180
41	1-1/2	PRWG-1-1/2	38.10~40.01	46.99~49.53	190	50 / 15.3	580*580*200
53	2	PRWG-2	50.80~52.83	59.69~62.23	255	25 / 7.6	550*550*200
63	2-1/2	PRWG-2-1/2	> 63.5	72.64~77.72	320	25 / 7.6	700*700*200
78	3	PRWG-3	> 76.2	85.34~90.42	380	25 / 7.6	750*750*250
91	3-1/2	PRWG-3-1/2	> 88.9	98.04~103.12	445	25 / 7.6	900*900*300
103	4	PRWG-4	> 101.6	110.74~115.82	510	25 / 7.6	900*900*300

Frequently Asked Questions (FAQ)

What is the difference between UL1 and UL360 flexible metal conduit?

UL1 flexible metal conduit is designed for dry locations and general wiring applications in buildings, while UL360 liquid-tight flexible metal conduit features a PVC jacket for waterproof protection and is suitable for wet locations, outdoor installations, and environments with oil or moisture exposure.

What does "Reduced Wall" or "Greenfield" mean in PRWG series?

"Reduced Wall" refers to the thinner wall thickness compared to standard flexible conduit, making it lighter and more flexible for easier installation in tight spaces. "Greenfield" is the industry term for flexible metal conduit, named after its inventor. The PRWG series combines both features for optimal performance in office buildings and data centers.

Can UL1 galvanized steel flexible conduit be used outdoors?

UL1 flexible metal conduit is primarily designed for indoor and dry location applications. For outdoor or wet locations, we recommend our UL360 Liquid Tight Flexible Metal Conduit (LFMC) series, which provides waterproof protection with a PVC jacket.

What is the maximum bending radius for galvanized steel flexible conduit?

The bending radius varies by conduit diameter. Generally, the minimum bending radius should be at least 10 times the conduit's outer diameter to prevent damage and maintain flexibility. Smaller sizes like 5/16" and 9/16" (PXRWG series) offer tighter bending radii, ideal for narrow spaces and corner installations.

How do I choose the right fitting for PRWG series flexible metal conduit?

Select fittings based on your installation requirements:

• Set Screw Type (S11/S12/S13): Quick installation, suitable for dry locations

• Compression Type: Provides stronger pull resistance

• 90° Squeeze Connectors: Ideal for corner installations

All fittings should be UL 514B listed and match your conduit trade size for proper connection and grounding.

Is the galvanized steel flexible conduit RoHS compliant?

Yes, our PRWG series flexible metal conduit is manufactured with materials that fully comply with RoHS standards, ensuring it is free from hazardous substances such as lead, mercury, and cadmium. This makes it environmentally friendly and safe for use in commercial buildings and data centers.

What applications are best suited for the Extra Reduced Wall type?

The Extra Reduced Wall type is particularly suited for:

• Office OA (Office Automation) systems

• Above-ceiling installations

• Light fixture connections

• Areas with limited space

• High-density wiring environments

Its ultra-thin wall design reduces weight while maintaining flexibility, making installation faster and easier in complex spaces.

Does UL1 flexible metal conduit provide grounding?

Yes, when properly installed with UL listed fittings, the galvanized steel construction provides an equipment grounding path. However, always verify local electrical codes, as some jurisdictions may require a separate grounding conductor for certain applications.