Electrical and installation work

From a distribution board in a basement to a solar array on a factory roof: every installation depends on the small consumables that keep the cable where it belongs. Since 2007, we have been the go-to wholesaler for cable ties, fastening materials and installation tapes, supplying electrical contractors, panel builders, data centres, marine installers and maintenance crews. Everything you see below is held in our own warehouse — no dropshipping, no waiting for a supplier to get around to shipping it.

Cable ties: bundling, mounting and securing

The cable ties you use inside a meter cupboard are not the ones for a flat roof or a tunnel. That is why we organise the range by the load the tie has to withstand: tensile strength, temperature, UV exposure and chemicals.

Polyamide 6.6 for everyday installation work

The standard tie is made from polyamide 6.6: strong, slightly flexible and self-extinguishing to UL94 V-2. In widths from roughly 2.5 to 13 mm and lengths from 100 to over 1000 mm, it covers almost all installation work — from a small bundle of control wiring in a panel to a heavy run of power cable on a cable tray. Use white cable ties indoors, inside enclosures and behind walls. Where the work stays visible or catches daylight, choose black tyraps: the carbon black in the compound gives the tie a far longer outdoor service life than a natural-coloured version.

Outdoors, on the roof and in the crawl space

The moment the cable goes outside, UV becomes the deciding factor. For PV installations, façade wiring, charging points and exterior lighting, work with extra UV-resistant tyraps, which hold their tensile strength for years where an ordinary tie turns brittle and snaps. In freezing conditions — cold stores, outdoor equipment in winter — cold-resistant tyraps prevent breakage during installation. And wherever corrosion, heat or chemicals come into play (marine installations, boiler rooms, process industry, tunnels), reach for stainless steel cable ties in 304 or 316 grade, which also survive a fire by a wide margin.

Heat-resistant, resealable and detectable

Around transformers, in boiler rooms and alongside exhaust runs, ambient temperatures sit well above what polyamide 6.6 tolerates in the long term; that is where heat-resistant cable ties belong. If the installation is still changing — a test rig, a panel under construction, a temporary supply — resealable cable ties save you cutting and re-tying. In food and pharmaceutical plants, the HACCP plan often calls for detectable tyraps, which the metal detector picks up if a fragment breaks off. Always trim with a cable tie tensioning tool: it cuts flush with the head, so no sharp spur is left behind for an engineer to catch a hand on.

Fastening materials: from adhesive mounts to pipe clamps

A tie on its own holds nothing to the wall. The fastening materials determine how the bundle ends up on the ceiling, the trunking or the enclosure door.

Adhesive mounts and cable clips: fixing without drilling

In an occupied building you want to drill as few holes as possible. Cable tie mounts are plastic bases with a self-adhesive underside; you thread the cable tie through the slot and fix a bundle to an enclosure door, a cable duct or a smooth wall. They come in several base sizes so you can match the mount to the width of the tie. For single runs and data cables along a skirting board or desk, self-adhesive cable clips are quicker: click the cable in and move on. Always degrease the surface before sticking — dust, silicones and fresh paint are the main reasons mounts let go later.

Screw mounts, wall plugs and pipe clamps

If the bundle carries weight, or hangs where heat attacks the adhesive, screw it down. Combine screw mounts with wall plugs for a fixing that stays put in concrete and sand-lime brick for years. For conduit, pressure lines and thin pipework, use pipe clamps, which hold the pipe clear of the wall. Where you need several fixing points in a straight line in a hurry — a plant room, a workshop, a temporary site supply — perforated mounting strip is the fastest answer: cut to length, bend and screw down.

Heat shrink tubing and hook-and-loop: insulating and finishing neatly

Heat shrink tubing on a roll

Heat shrink tubing on a roll lets you cut exactly the length you need, which produces far less offcut than pre-cut pieces when you are working on soldered joints, ferrules and repaired sheathing. The polyolefin tubing shrinks at a 2:1 ratio and closes tightly around the joint under a hot air gun: insulation, mechanical protection and strain relief in one operation. Heat evenly from the middle outwards so no air gets trapped.

Hook-and-loop tape for bundles that keep changing

In a patch cabinet, a control panel or a broadcast rack, the cabling changes constantly. Hook-and-loop tape on a roll is cut to length and opened hundreds of times without damaging the jacket — exactly what fibre and Cat cable need, since they cope poorly with the point load of a tightly pulled plastic tie. Spiral wrap does a similar job where you want a tidy, flexible bundle that still accepts an extra core later on.

Tapes for the electrical trade

Insulation tape: insulating and phase marking

Insulation tape made from soft PVC stretches with the conductor diameter and stays supple for years. Beyond insulating, the coloured versions are used for phase identification: brown, black and grey for L1, L2 and L3, blue for neutral and green-yellow for earth. Wrap with roughly half overlap and lay the final turn on without tension, otherwise the end creeps back over time.

Aluminium tape, marking tape and duct tape

On ductwork, insulation jackets and vapour barriers, aluminium tape seals seams airtight and reflects radiant heat. When you run a cable protector or hose across a walkway temporarily, floor marking tape flags the route and anti-slip tape keeps a stair or platform safe to use. On stair nosings, cabinets and tool cases in poorly lit plant rooms, reflective tape makes obstacles visible. For quickly closing a penetration, bundling a temporary run or taping up a crate, duct tape is still the van's workhorse, and double-sided tape fixes trunking, a cable channel or a sign without visible fasteners.

Marking, cordoning off and site safety

If you are working in a building that stays in use, cordoning off your work area is part of the job. Barrier tape secures an open distribution board, a floor chase or a stripped ceiling so nobody walks into it. Cable ties with a marker label give every core or bundle a number you write on site — during a fault or an upgrade that saves hours of tracing. For permanent identification, labels and cash register rolls include PVC and metal labels. For the engineer, there are work gloves, and if you want your company name on the tie itself, look at printed cable ties.

Specifications at a glance

Product group	Versions	Dimensions	Material	Use in electrical and installation work
Cable ties	White, black, coloured, UV-resistant, cold-resistant, heat-resistant, heavy duty, resealable, detectable, stainless steel	Width 2.5 – 13 mm; length 100 – 1000+ mm	Polyamide 6.6 (UL94 V-2), polyamide 12, stainless steel 304/316	Bundling power, control and data cable; mounting to trays, trunking and basket tray
Cable tie mounts and clips	Self-adhesive, slotted for cable ties; clips for single cables	Base sizes matched to tie widths of 2.5 – 9 mm	Polyamide with acrylic adhesive	Fixing to enclosure doors, cable ducts and smooth walls without drilling
Screw mounts, wall plugs, pipe clamps	Screw-fixed, with and without plug; clamps for conduit	Various pipe diameters and screw sizes	Polyamide, polypropylene	Permanent fixing points in concrete, sand-lime brick and plasterboard
Heat shrink tubing on a roll	2:1 shrink ratio, cut to length	Various diameters, supplied on a roll	Polyolefin	Insulating joints, repairing sheathing, strain relief
Hook-and-loop tape	Supplied on a roll	Various widths and roll lengths	Nylon/polyester	Reusable bundling of fibre, Cat and patch cabling
Insulation tape	Black and in phase colours	Rolls of 10 and 20 metres, approx. 0.15 mm thick	Soft PVC with rubber adhesive	Insulating joints, phase marking and core identification
Marking and signalling tape	Floor marking, anti-slip, reflective, aluminium	Various widths and roll lengths	PVC, aluminium foil, grit anti-slip laminate	Marking cable routes, keeping walkways safe, sealing ducts airtight
Barrier tape	Printed and unprinted	Rolls in various lengths	Polyethylene	Cordoning off open boards, chases and work areas

Why electrical contractors work with Kortpack

From our own stock, so it is in the van tomorrow

An engineer standing on site without ties or insulation tape costs more than the entire order is worth. That is why our consumables are held in our own warehouse. Ordered on working days before 3:30 PM? Then your order will be shipped the same day.

Better pricing on larger volumes

Consumables add up: an electrical contractor gets through tens of thousands of them a year. Buying in bulk packs shows up directly in your cost per metre of cable tray. And when materials have to travel to a project or a customer, shipping materials and protective and filling materials cover everything needed to get a panel, a test instrument or a light fitting to site undamaged.

Advice from people who know the product

Torn between a UV-resistant polyamide tie and stainless steel, or between an adhesive mount and a screw mount? Our staff will think it through with you based on the environment, the load and the service life you expect from the fixing. Do you have questions about which size of cable ties is best suited to your situation? Please don't hesitate to contact us — by phone on +31 184 – 614256, via info@kortpack.nl or via WhatsApp.

Frequently asked questions from electrical installers

Which cable tie should I use outdoors?

Outdoors, UV exposure is the governing load. A natural-coloured polyamide tie turns brittle in full sun within a few seasons. Choose a black or an extra UV-resistant version; the carbon black in the compound blocks the UV. For coastal sites, roofs that build up a lot of heat and installations expected to last decades, a stainless steel tie is the safest choice.

Are polyamide 6.6 cable ties flame retardant?

Standard polyamide 6.6 is self-extinguishing to UL94 V-2: the tie will not keep burning on its own once the flame is removed. That is not the same as fire resistant. Where a cable route must stay functional during a fire, or where a fire-stopped penetration is being built, specifications generally call for metal supports and stainless steel ties.

Can I pull a cable tie around a fibre optic cable?

Not tightly. A plastic tie applies a point load to the jacket, and with fibre and Cat cable that can affect the geometry and therefore the attenuation. Use hook-and-loop tape on a roll instead: it spreads the force across its full width and can be reused when the patching changes.

How do I stop adhesive mounts from coming loose?

Almost always it comes down to the surface. Degrease and dust the spot, do not stick to fresh paint or a silicone-based coating, and press the mount firmly for a few seconds so the acrylic adhesive can key in. It only reaches full strength after about a day, so do not load the bundle fully straight away. If it gets warm, or the bundle carries weight, use a screw mount.

Which colours of insulation tape do I use for phase marking?

In a common three-phase installation you mark L1, L2 and L3 in brown, black and grey, neutral in blue and earth in green-yellow. Always check the identification agreed in the project or specification; older installations still use other colour schemes.

What is the difference between heat shrink on a roll and pre-cut lengths?

In substance, nothing: it is the same polyolefin tubing with a 2:1 shrink ratio. From a roll you cut only what you need, which means considerably less waste when conductor sizes vary and on repair work. For a service van with limited storage, one roll per diameter is more practical than an assortment box.

Do I need a proper tool to cut cable ties?

We strongly recommend it. Side cutters leave an angled spur that cuts through a work glove and chafes against cable jackets. A cable tie tool cuts flush with the head and adds an adjustable, repeatable tension — so you do not end up with one bundle too loose and the next pulled tight enough to deform the jacket.

Does Kortpack supply smaller contractors too?

Yes. You can order from a single bag or a single roll, with no minimum order value. As your usage grows, you simply move up to bulk packs.