Polycab 25 mm HMS FRLS uPVC Conduit Pipe – Heavy Mechanical Stress, 3 m Length, CPI0325001

Polycab 25 mm HMS FRLS uPVC Conduit Pipe (code CPI0325001) is a rigid uPVC FRLS (flame retardant, low smoke) conduit of the heavy mechanical stress class to IS 9537 (Part 3): 25 mm outside diameter (tolerance -0.4 mm), at least 20.6 mm inside diameter, supplied in 3 m lengths packed 50 to a standard pack. The 25 mm size is the usual size for socket, power and air-conditioner circuits, which carry larger wires or more of them; the heavy class is meant for conduit cast into RCC slabs and floors, laid under floor screeds, or run where it can be knocked, stepped on or crushed.

Polycab India Limited is India's largest manufacturer of wires and cables, with 27 manufacturing facilities, 4,300+ authorised distributors, 2,00,000+ retailers and an export presence in 84 countries (polycab.com, October 2026). Polycab is ISO 9001:2015 certified and makes its conduits to IS 9537 (Part 3) and its conduit fittings to IS 3419, from what its catalogue calls "the highest grade of waterproof and fire-resistant polymers". Jai Enterprises supplies Polycab 25 mm HMS FRLS conduit from Bhilai and Raipur all over Chhattisgarh - Bhilai, Raipur, Durg, Korba, Bilaspur, Raigarh, Jagdalpur, Kanker, Ambikapur and every other district - and across India; price on request.

Is this the right one for you?

Check these five things before you order:

• The wires fit the bore: at least 20.6 mm inside diameter - check the number and size of wires against the conduit-capacity table you work to.
• The conduit is cast into an RCC slab, laid in a floor or exposed to knocks and loads - the heavy mechanical stress class is made for that.
• Flame-retardant, low-smoke (FRLS) conduit is wanted or specified for the building.
• Matching Polycab 25 mm fittings - circular, deep and fan boxes, bends, tees, elbows, couplers and saddles - are listed below.
• If the size does not fit: for fewer or smaller wires, 20 mm; for more room, 32 mm.

At a glance

• Price: on request - call +91 9340081159
• Product: Polycab 25 mm HMS FRLS uPVC Conduit Pipe
• Product code: CPI0325001
• Outside diameter: 25 mm (tolerance -0.4 mm)
• Minimum inside diameter: 20.6 mm
• Mechanical stress class: Heavy Mechanical Stress (IS 9537 Part 3)
• Fire performance: FRLS - flame retardant, low smoke
• Length: 3 m
• Standard pack: 50 x 3 m (150 m)
• Colours: black, ivory, grey and red in the Polycab colour chart (availability by size and series on enquiry)
• Standard: IS 9537 (Part 3)

Specifications

• Nominal size: 25 mm (outside diameter)
• Tolerance on outside diameter: -0.4 mm
• Minimum inside diameter: 20.6 mm (heavy class, IS 9537 Part 3 value printed in the Polycab catalogue)
• Minimum inside diameter of the three classes at 25 mm: light 22.1 mm; medium 21.4 mm; heavy 20.6 mm
• Length: 3 m per length
• Standard pack: 50 x 3 m (150 m)
• Product code: CPI0325001
• Material: rigid uPVC, FRLS compound
• Standard: IS 9537 (Part 3); fittings to IS 3419
• Colours: black, ivory, grey and red in the Polycab colour chart (availability by size and series on enquiry)

Why choose Polycab HMS FRLS uPVC Conduit Pipe

• Flame retardant, low smoke (FRLS) compound - resists the spread of flame and gives off less smoke, for safer wiring in homes and public buildings
• Heavy Mechanical Stress class to IS 9537 (Part 3) - the thickest wall and smallest bore of the three classes, for conduit cast into RCC slabs and floors, laid under floor screeds, or run where it can be knocked, stepped on or crushed
• Waterproof, fire-resistant polymer - the catalogue describes Polycab uPVC conduits as made "only from the highest grade of waterproof and fire-resistant polymers"
• Five sizes, 20 to 50 mm outside diameter - one series for lighting, power, sub-mains and risers
• 3 m lengths in standard packs - 75 lengths of 20 mm down to 15 lengths of 50 mm per pack, easy to count and order
• Matching Polycab fittings to IS 3419 - circular and deep boxes, fan boxes, bends, tees, elbows, couplers, reducers and saddles

Using 25 mm conduit

Wires per conduit: a 25 mm conduit of the heavy class has at least 20.6 mm of clear bore. Work out how many wires it can take from the conduit-capacity table you follow (for example the one in IS 732) or the consultant's drawings, and step up a size for long runs with several bends.

Joining and bending: join lengths with a Polycab 25 mm coupler (PVC solvent cement makes the joint permanent in concealed work); make bends with a bending spring of the right size or with Polycab bends and elbows.

Fixing: fix surface runs with saddles at regular spacing; in slabs, tie the conduit to the reinforcement and seal open ends before the concrete is poured; leave a draw wire in long runs.

Where it is used

• The usual size for socket, power and air-conditioner circuits, which carry larger wires or more of them
• Conduit cast into RCC roof and floor slabs
• Floor runs under screeds and tiles
• Industrial buildings, workshops and plant rooms

Other sizes of Polycab HMS FRLS uPVC Conduit Pipe

The Polycab HMS FRLS uPVC Conduit Pipe overview page compares all 5 side by side.

• Polycab HMS FRLS uPVC Conduit Pipe 20 mm - code CPI0320001, minimum inside diameter 15.8 mm, pack 75 x 3 m (225 m)
• Polycab HMS FRLS uPVC Conduit Pipe 25 mm (this page) - code CPI0325001, minimum inside diameter 20.6 mm, pack 50 x 3 m (150 m)
• Polycab HMS FRLS uPVC Conduit Pipe 32 mm - code CPI0332001, minimum inside diameter 26.6 mm, pack 25 x 3 m (75 m)
• Polycab HMS FRLS uPVC Conduit Pipe 40 mm - code CPI0340001, minimum inside diameter 34.4 mm, pack 25 x 3 m (75 m)
• Polycab HMS FRLS uPVC Conduit Pipe 50 mm - code CPI0350001, minimum inside diameter 43.2 mm, pack 15 x 3 m (45 m)

Related products

• Polycab LMS FRLS uPVC Conduit Pipe 25 mm - light mechanical stress, minimum inside diameter 22.1 mm, code CPI0125001
• Polycab MMS FRLS uPVC Conduit Pipe 25 mm - medium mechanical stress, minimum inside diameter 21.4 mm, code CPI0225001
• Polycab LHSFT MMS Conduit Pipe 25 mm - medium mechanical stress, minimum inside diameter 21.4 mm, code CPI0425002
• Polycab LHSFT HMS Conduit Pipe 25 mm - heavy mechanical stress, minimum inside diameter 20.6 mm, code CPI0725002
• Matching 25 mm fittings: Polycab PVC Circular Box - Terminal (1 Way), Polycab PVC Circular Box - Tee (3 Way), Polycab PVC Deep Circular Box - Terminal (1 Way), Polycab PVC Fan Box (Standard), Polycab PVC Conduit Coupler, Polycab PVC Inspection Bend, Polycab PVC Saddle Strap
• All uPVC conduits and all conduit fittings

Frequently asked questions

What is the inside diameter of Polycab 25 mm HMS FRLS conduit?

At least 20.6 mm - the IS 9537 Part 3 minimum for the heavy class at 25 mm outside diameter (tolerance -0.4 mm), as printed in the Polycab catalogue. At 25 mm the three classes have a minimum bore of 22.1 mm (light), 21.4 mm (medium) and 20.6 mm (heavy).

How many lengths are in a pack of Polycab 25 mm HMS FRLS conduit?

50 lengths of 3 m - 150 m per standard pack. Tell us the number of lengths or packs you need.

What is the product code of Polycab 25 mm HMS FRLS conduit?

CPI0325001. Quote it on your purchase order or tender so the right series, class and size are supplied.

Should I use 20 mm or 25 mm conduit for power points?

Socket and power circuits use larger wires (2.5 to 4 sq mm) and often more of them, so 25 mm is the usual choice - it leaves room to draw the wires in without damage. 20 mm is normally kept for lighting.

LMS, MMS or HMS - which class should I choose?

Light (LMS) for surface runs and above false ceilings, medium (MMS) for conduit concealed in walls and ceilings, heavy (HMS) for slabs, floors and places where the conduit can be crushed or knocked. At 25 mm the minimum bore is 22.1 mm (light), 21.4 mm (medium) and 20.6 mm (heavy).

Where can I buy Polycab 25 mm HMS FRLS conduit in Chhattisgarh?

From Jai Enterprises, Bhilai and Raipur, which supplies Polycab conduits and fittings across Chhattisgarh - Korba, Bilaspur, Raigarh, Jagdalpur, Kanker, Ambikapur and every other district - and across India. Call +91 9340081159 with the size, quantity and delivery location and we will confirm the price, availability and lead time.

How to order

Supplied by Jai Enterprises, Bhilai and Raipur, to every district of Chhattisgarh and across India. To request a price for Polycab 25 mm HMS FRLS conduit (CPI0325001), call +91 9340081159 or send an enquiry from this page with the size, the quantity (lengths or packs) and the delivery location, and we will confirm the price, stock and lead time.