- Delton Cables is a 75-year-old Indian manufacturer that has quietly reinvented itself from a telecom-cable brand into a customised supplier of low-voltage cables, wires and switchgear for the country’s most demanding infrastructure customers - railways, power contractors and telecom networks. Founded in 1948 by the Gupta family and listed on the Bombay Stock Exchange for over five decades, the company is now run by second and third generation leaders of the Gupta family, who have focused the business on a single idea: become the go-to partner for high-growth B2B sectors by offering a wide, approved product range under one brand, rather than chasing retail volumes. That recurring approach - deep approvals, a single “DELTON” brand, and an asset-light manufacturing model that expands in step with orders - explains everything that follows.
Business segments
A single cable-and-switchgear engine, organised into three customer-facing channels - EPC, railways and telecom - that share the same plants, the same brand and the same low-voltage expertise.
1. EPC cables: the growth engine feeding India’s infrastructure build-out
Customised control and instrumentation cables sold directly to top-tier engineering contractors, now the company’s largest and fastest-growing revenue stream.
- One-stop shop for contractors - the company supplies industrial braided instrumentation cables, overall shielded cables, individually shielded instrumentation cables and control cables, all under the DELTON brand, so an EPC contractor can source multiple cable types from a single approved vendor rather than stitching together orders from several suppliers.
- Approvals open the door - marquee customers such as L&T, ABB, Siemens and BHEL are on the company’s books, and winning each new EPC client requires passing rigorous technical qualification processes that act as a barrier to smaller or unbranded competitors.
- Capacity added ahead of demand - a new EPC-dedicated plant in Palwal, Haryana, was commissioned in October 2024, expanding the combined manufacturing capacity across three plants to roughly ₹1,500 crore, which lets the company accept larger orders without straining its older Faridabad facility.
- Order book tilts toward EPC - as of September 2025, about 91% of the company’s ₹425 crore order book came from EPC and telecom segments combined, with EPC alone making up 85% of the ₹300 crore order book six months earlier, showing how contractor demand is pulling the business forward.
2. Railway cables: the moat built on market leadership in signalling
A specialised range of underground signalling and quad cables that makes Delton the consolidated supplier of choice for Indian Railways and metro networks.
- Market leadership in quad cables - the company has built a consolidated market share of railway-segment cables under one brand and is strengthening its lead specifically in quad cables, the specialised cables used for track-side signalling circuits.
- Products that go underground and stay there - the railway range includes underground signalling cables, power cables, railway quad cables and underground PIJF (polyethylene-insulated jelly-filled) telephone cables, all designed for the vibration, moisture and reliability demands of rail infrastructure.
- A captive, policy-driven customer - Indian Railways and metro projects are government-backed buyers with long procurement cycles and stringent specifications; once a cable type is approved and installed, the switching cost is high, creating repeat business for the incumbent supplier.
- Stable counterweight to EPC cycles - while the EPC business is growing faster, railways contributed roughly a third of revenue in the first nine months of FY26, providing a steady base of orders that does not swing as sharply with private-sector capex cycles.
3. Telecom cables: the legacy reborn through fibre and smart metering
The original business, now modernised into optic-fibre cables and a new smart-meter play, serving the digitisation of India’s networks.
- From copper to fibre - the telecom range has evolved from the telephone and jelly-filled copper cables that built the brand over seven decades into optic-fibre cables, while still supplying railway telephone cables for legacy rail communication networks.
- A new plant for a new cycle - a third manufacturing facility at Prithla, Haryana, was set up specifically for telecom products and began commercial production in June 2025, timed to catch the next wave of telecom infrastructure spending.
- Smart meters are the adjacency - the company has added metering solutions (smart meters) to its portfolio, leveraging its existing B2B relationships and low-voltage expertise to enter a government-push sector without building an entirely new capability.
- Smaller share, strategic role - telecom and other segments made up 17% of revenue in the first nine months of FY26, but the segment gives the company a seat at the table in two of India’s largest infrastructure modernisation programmes: broadband expansion and the smart-meter rollout.
Manufacturing and operations
Three plants in Haryana run on an asset-light model where capacity is added through leased facilities and debottlenecking, keeping the balance sheet lean while utilisation rises.
- Leased, not just owned - the company owns its original freehold land and plant on Mathura Road, Faridabad, but its two newest plants in Palwal, Haryana, are on leased industrial property, allowing expansion without large upfront land purchases.
- Sweated the existing assets first - before adding new plants, the company spent about ₹8.5 crore over two years on debottlenecking its Faridabad facility, which lifted capacity utilisation from 44% in FY22 to 81% in FY25, extracting more output from the same footprint.
- Working capital tightened sharply - the cash conversion cycle was cut from 214 days in FY22 to 87 days in FY25 by rationalising inventory SKUs and focusing on a narrower product range, which means less cash is tied up in raw materials and finished goods.
- In-house PVC compounding - the company manufactures its own PVC compound, the plastic used to insulate cables, giving it control over a key raw-material input and some insulation from supplier price swings.
Group structure and partners
A promoter-led standalone company with no subsidiaries, run by the third generation of the founding family alongside a professional board.
- Succession is in plain sight - Ms. Shriya Gupta, daughter of the Chairman, already handles business development, signalling that the family intends to keep the business closely held while professional management runs day-to-day operations.