Risers and life safety circuits specified for the evacuation plan
Voltcore supplies halogen-free distribution, fire rated mineral insulated and fire alarm cable for towers, hotels, hospitals and housing projects.
Building services cabling is unusual in that the dominant requirement is what happens under fault rather than under normal load. Smoke density and halogen acid gas release decide whether occupants can see an exit and whether switchgear in an adjacent room survives the incident, so the reaction-to-fire class and the circuit integrity requirement govern the specification before conductor size is even considered. Modern loads complicate the picture further: LED lighting, lift drives, data centre racks and EV chargers all produce harmonic current that raises neutral conductor temperature in a three-phase distribution board sized on the assumption of a balanced load.
Voltcore Cable has produced building and construction cable from Yixing, Jiangsu since 2008, with 32 lines covering low smoke halogen-free constructions, fire rated designs and standard building wire variants. Certifications held include ISO 9001, ISO 14001 and ISO 45001, CE marking to CPR EN 50575 for construction products placed in the European market, plus RoHS and REACH compliance. Contractors normally take riser sub-mains, distribution tails, fire alarm circuit cable and emergency lighting supply together, which Voltcore supplies cut to length against the riser schedule from Shanghai or Ningbo.
Halogenated sheaths release hydrogen chloride when they burn, which corrodes contacts in adjacent panels and reduces visibility in escape routes. Low smoke halogen-free compounds limit both, and for enclosed public buildings that difference is the whole point of the specification rather than a nice-to-have.
Fire pumps, smoke extract fans, emergency lighting and fireman's lifts must keep running while the building is burning. Copper sheath mineral insulated cable provides inherent circuit integrity at temperatures above 900 °C, which is why life safety circuits are designed from the fire strategy backwards.
Switch-mode power supplies throughout the building generate third harmonic current that adds in the neutral rather than cancelling. A board loaded with LED fixtures, IT equipment and lift drives can carry neutral current at or above phase current, which changes both conductor sizing and termination practice.
Long vertical drops need armoured or clamped constructions that carry their own weight at intervals, and every support point must spread load without deforming the sheath. Fire stopping compounds also have to remain chemically compatible with the jacket over decades of contact.
Cable arrives months before the building is weatherproof and is often pulled through partially finished shafts. Scratch resistance, minimum bending radius during installation and clear drum marking matter more on site than almost any laboratory property.
Selected from 67 types because they match the conditions above, not because they are our best sellers.
Distribution sub-mains and riser cable in towers, hospitals and schools where smoke density must be limited.
Full specification →Emergency circuits that must keep supplying lighting and smoke control equipment while staying halogen free.
Full specification →Addressable fire alarm loops, sounder circuits and emergency luminaire supplies in public buildings.
Full specification →Fire resistant supply to sprinkler pumps, pressurisation fans and essential services boards in commercial towers.
Full specification →Copper sheathed mineral insulated cable for life safety circuits routed through the hottest parts of escape routes.
Full specification →Flexible mineral insulated construction where long uninterrupted lengths avoid joints on high-rise riser runs.
Full specification →Buried incoming service ducts and car park distribution where mechanical protection is needed before the riser starter.
Full specification →A mixed-use tower with two basement levels required distribution from the ground floor substation to consumer units on every floor, plus supplies to smoke extract plant on the roof.
Sub-mains were specified in low smoke halogen-free XLPE power cable with aluminium options reviewed for the longest runs, while the smoke extract and pressurisation fan supplies were specified in fire resistant multi-core cable with copper sheath alternatives for the hottest zone. Voltcore cut lengths to the riser schedule and marked each drum with floor destination, which removed cutting waste on site.
A hospital extension needed options for the theatre block emergency lighting distribution without interrupting the existing building supply during installation.
Voltcore supplied halogen-free fire resistant and emergency lighting circuit constructions alongside screened control pairs for the generator changeover logic, all delivered in one shipment from Ningbo. Free sample lengths of up to 5 m were sent first so the consultant could confirm the sheath marking and colour coding before the bulk order was released.
Examples are illustrative; project references and documentation available on request.
Include cross-section, core count, voltage grade, route length and installation method — those five determine price more than anything else on the page.
Low smoke halogen-free describes what happens when the cable burns: limited smoke and no halogen acid gas. Fire rated describes circuit integrity, meaning the cable must continue supplying equipment while exposed to fire. Many projects need both properties at once, which is why constructions combining halogen-free compounds with mica fire barrier tapes exist alongside copper sheathed mineral insulated types.
Voltcore holds CE marking to CPR EN 50575 for cable constructions placed in the European market, supported by ISO 9001 quality management along with ISO 14001 and ISO 45001. RoHS and REACH compliance documentation is also available. Please state the required reaction-to-fire class at enquiry stage so the correct declared performance is quoted.
Frequently yes, if a circuit feeds predominantly switch-mode loads. LED fixtures, IT equipment and lift drives generate third harmonic current that adds arithmetically in the neutral conductor. Where such loads are a large share of the board, specifying an equal-size or enlarged neutral avoids overheating at terminations, which is the usual failure point rather than the conductor itself.
Yes. Cut-to-length production against a riser schedule is one of the most requested services for building projects, together with private label drum marking showing floor, riser and circuit reference. MOQ is 500 m per size, with lead time of 15–25 working days and shipment from Shanghai or Ningbo.
RFQs are answered by an application engineer first. Typical reply within 12 hours, CST working days.