.png)
A new commercial tower in Delhi NCR can need hundreds of metres of underground feeder cable before its first tenant moves in. The consultant must fix the core count, insulation, armour and size, and the buyer must find an LT power cables manufacturer Delhi projects can depend on for consistent quality. A wrong choice shows up later as overheating, sheath damage or a rejected inspection.
This guide explains how a 4 core aluminium armoured cable is built, what each layer does, which standards apply, and what to check before you place an order. It draws on the published specifications of the Prem Cables LT XLPE range.
It is a low tension power cable rated up to 1.1 kV that carries three phases and a neutral inside one armoured, sheathed cable. Engineers mainly use it for underground mains, sub-main feeders and distribution circuits in buildings, factories and utility networks.
Prem Cables manufactures its LT XLPE power cables with aluminium conductors and XLPE insulation for power distribution up to 1.1 kV. The range comes in armoured and unarmoured versions, in 2, 3 and 4 core formats, from 4 sq.mm to 1000 sq.mm.
Keep one boundary clear. LT cables serve circuits up to 1.1 kV. Medium voltage feeders up to 33 kV need HT XLPE cables, which use a different, screened construction.
Cut a 4 core armoured cable open and you will see five distinct layers. Each one solves a specific problem.
The cores use stranded aluminium conductors made to IS 8130. Stranding makes a large conductor easier to bend, route and terminate than a solid bar of the same size. Aluminium also keeps the cable lighter, which helps on long trench runs and cable trays.
Each core carries cross-linked polyethylene (XLPE) insulation as per IS 7098 Part 1. XLPE supports 90 °C continuous operation, 120 °C during overload, and 250 to 280 °C during a short circuit. Coloured insulation on each core lets the jointing team identify the phases and the neutral quickly at site.
An extruded PVC inner sheath with a non-hygroscopic filler binds the four cores together. Non-hygroscopic means the filler does not absorb moisture, so it gives the armour a firm, even bed.
Multicore cables use galvanised iron (GI) strip or wire armour. Single core cables use aluminium armour instead. The armour protects the cores from crushing, digging tools and other mechanical damage after burial.
The outer layer uses a PVC-ST2 sheath. Buyers can also choose FRLS (Flame Retardant Low Smoke) or LSZH (Low Smoke Zero Halogen) variants where fire safety matters, such as service shafts and enclosed basements.
Delhi summers push ambient temperatures high, and building feeders often run near full load for long hours. Insulation with thermal headroom gives a feeder more margin under these conditions.
The numbers on Prem's own product pages show the gap clearly. Its XLPE cables run at up to 90 °C continuously and tolerate 250 to 280 °C during a short circuit. Its PVC LT underground cables operate up to 70 °C and handle up to 160 °C during a short circuit. XLPE also offers low dielectric losses and good resistance to oils and chemicals, which suits industrial plants and plant rooms.
That does not make XLPE the right answer for every circuit. PVC cables remain a cost-effective choice for low voltage networks with moderate loads and simpler duty. The correct selection depends on load current, installation method, ambient conditions, fault level and the project specification. Current ratings always change with how and where the cable is laid.
Delhi NCR combines dense commercial districts, large housing societies, data centres, hospitals and industrial estates. Most of these sites rely on armoured LT cables somewhere between the transformer and the final distribution board.
Prem Cables lists the following applications for its LT XLPE range:
In a typical high-rise, a 4 core armoured cable might run from the LT panel in the basement to floor-wise distribution boards through a shaft. In a factory, the same construction can feed motor control centres across the plant. Replacement work is also common in older parts of the city, where utilities and building owners upgrade worn duct-bank cables.
Price matters, but a cable that fails a test or degrades early costs far more than the initial saving. Use these checks to compare suppliers on technical grounds.
Check the standards on the documents, not only on the brochure. IS 7098 Part 1 is the primary Indian reference for XLPE insulated cables up to 1.1 kV. IS 8130 covers the conductors, IEC 60502-1 applies where a project follows international specifications, and IEC 60332 covers flame propagation testing. Ask which standards apply to your specific order and request the matching test certificates.
Confirm the routine test voltage. Prem Cables states a typical test of 3 kV for 5 minutes under IS 7098 Part 1, and 3.5 kV for 5 minutes under IEC 60502-1.
Match the size to the real installation. Prem's LT XLPE range covers current ratings from 55 A to 1,013 A and short circuit ratings up to 28.3 kA. These values depend on installation conditions, so your designer should apply the correct derating for burial, trays, grouping and ambient temperature.
Pick the right sheath for the location. Specify FRLS or LSZH where smoke and fire spread are a concern. The standard PVC-ST2 sheath suits many outdoor and buried runs.
Ask about manufacturing and testing control. Prem Cables operates ISO 9001:2015 certified processes and an in-house testing laboratory. It also produces aluminium wire rods, the raw material for conductors, within its integrated facilities in Rajasthan. Backward integration of this kind gives a manufacturer direct control over conductor material quality.
A well-made cable can still fail early if the installation goes wrong. Most site damage happens during pulling, bending and termination.
Respect the minimum bending radius. Prem specifies 12 times the overall cable diameter for its LT XLPE cables, so plan trench corners, tray bends and panel entries around that figure. Protect the outer sheath during pulling, because a cut sheath lets moisture reach the armour over time.
For a fuller checklist, read our guide to LT power cable installation practices for safe and reliable performance.
Prem Cables was founded in 1964 at Pipalia Kalan in Rajasthan, and it has since grown into a manufacturer of aluminium wire rods, conductors and power cables. Its manufacturing units sit in Rajasthan, while a regional office serves buyers in Delhi NCR from Gaur City Centre in Greater Noida West. The company also runs regional offices in Mumbai and Jaipur.
For contractors and consultants in the capital region, this setup combines a factory with integrated production lines and a nearby team for enquiries, documentation and coordination.
A 4 core aluminium armoured LT XLPE cable earns its place in Delhi NCR projects because it handles heavy loads, resists mechanical damage underground and offers fire-safe sheath options. The right choice still depends on the load, the installation method and the project specification, not on the cable type alone.
When you compare an LT power cables manufacturer Delhi buyers can rely on, look for clear standards, routine test data, correct sizing support and control over raw material. Review the full Prem Cables LT XLPE specifications, then contact the Prem Cables team to discuss sizes, sheath options and technical documents for your next project.
It is a low tension power cable rated up to 1.1 kV that carries three phases and a neutral in four aluminium cores, with armour and an outer sheath for mechanical protection.
LT XLPE power cables serve power distribution up to 1.1 kV AC. Circuits above that level, up to 33 kV, need HT XLPE cables.
IS 7098 Part 1 is the primary Indian standard for XLPE insulated cables up to 1.1 kV, and IS 8130 covers the conductors. IEC 60502-1 and IEC 60332 apply where projects follow international specifications or need flame propagation testing.
Prem Cables rates its XLPE cables for 90 °C continuous and up to 250 to 280 °C during a short circuit, while its PVC LT cables run up to 70 °C and 160 °C. The right choice depends on load, installation method and project specification.
Prem Cables offers LT XLPE cables from 4 sq.mm to 1000 sq.mm in 2, 3 and 4 core formats, in armoured and unarmoured versions.
Multicore LT XLPE cables use galvanised iron strip or wire armour, while single core cables use aluminium armour.
Prem Cables specifies a minimum bending radius of 12 times the overall cable diameter for its LT XLPE power cables.
Yes. Prem Cables has a regional office at Gaur City Centre, Sector 4, Greater Noida West, alongside offices in Mumbai and Jaipur.
