Extension cable 63A 5x16mm2 20m – hO7RN-F 5G16 63A manufactured in Finland for construction site use. All our extension cables can also be manufactured according to customers’ specifications within a short time frame.

Extension cable 63A 5x16mm2 20m on the worksite

Cables are the part of a site installation that is handled most and inspected least. Choosing the right type and cross-section is what keeps the installation safe over the whole project.

This model is rated 63 A. Size the equipment by the actual simultaneous load – the sum of the nameplate ratings almost always leads to oversizing.

Where the product is used

Typical sites are construction projects, renovations, industrial maintenance and event power. What they share is that the electrical supply is temporary and the conditions are demanding.

Temporary does not mean lighter requirements. Site equipment is exposed to dust, moisture, moving and mechanical stress in a way that fixed installations never are.

Check the load distribution between phases during use. Uneven distribution overloads one phase while the others run half empty, and the usual symptom is a fuse that keeps tripping.

How to choose the right model

The cross-section is chosen by load current, installation method, ambient temperature and cable length. The sizing is done by a designer or an electrical contractor – cable is not chosen by eye.

An undersized cable heats up and causes voltage drop. The symptom is familiar: the machine runs slowly at the end of a long cord. The answer is a thicker cable, not a bigger fuse.

Other models of the same type are Extension cable 10A 20m 2-way extension socket, Extension cable 16A (230V) 20m 2-way extension socket, Extension cable 125A 20m, Extension cable 16A (230V) 20m PCE 2-way extension socket, Plugs and extension sockets 400V (PCE).

You can see the full range in the product group, and read about real-time monitoring on the Spine page.

Practical notes for use

On a site the cable is exposed to mechanical damage from machines, tools and traffic. Protect cables in walkways and lift them off floor level wherever possible.

Store the cable on a drum and under cover, and mark the remaining length. Most of the waste on a site comes from nobody knowing what is left on the drum.

Calculate the length along the actual route, not as the crow flies. Cable routes go around structures, and a cable that ends up too short means an extra joint – and a joint is always a weak point.

Extension cable 63A 5x16mm2 20m – installation and maintenance

Installation and connection work is carried out by a qualified electrician. The equipment must be made dead before connection work, and the absence of voltage verified by measurement.

Unwind the cable before loading it. A cable left on the drum cannot cool and heats up in the coils even when the current stays within its rating.

Check the sheath before use. A cut or crack removes the cable’s protection, and the damage is not repaired with tape – the cable is replaced or re-terminated.

Do not go below the permitted bending radius and never pull a cable by its conductors. Both damage the construction permanently even if the fault does not show immediately.

Check the joints and fixings regularly during use. A joint that heats up is a sign of a fault and should be corrected before the fault spreads.

Safety and inspections

Site electrical installations are subject to the same requirements as fixed installations, and some of them are stricter. The equipment has to withstand moving, dust, moisture and mechanical stress for the whole project.

The installation is inspected at commissioning and regularly during use: enclosure, joints, the operation of the protective devices and the fact that live parts cannot be reached.

Damaged equipment is not repaired improvised on site. A cracked enclosure, a burnt terminal or a damaged socket is replaced – on a site a temporary repair almost always becomes permanent.

Document the configuration and any changes made. Up-to-date information on outputs and protection speeds up fault-finding and the next inspection.

Delivery and sizing help

We deliver the equipment together with the cables and the rest of the site power supply in one delivery, so the set is complete when it arrives on site.

Describe the whole site in your request for quotation: supply power, the outputs needed and the estimated length of the project. We size the set on that basis.

We also help with the sizing. If you are unsure about the size or the number of outputs, ask us – equipment sized wrong costs more than equipment chosen right the first time.

Extension cable 63A 5x16mm2 20m – technical data

Cable	H07RN-F 5x16mm²
Cable length	20 m
Socket	63A
Country of manufacture	Suomi

Frequently asked questions

What is the rated current of Extension cable 63A 5x16mm2 20m?

The rated current is 63 A.

How long is the cable?

Length: 20 m.

Who may install the product?

Installation is carried out by a qualified electrician. The requirements are explained in more detail on the Tukes website.

The requirements for electrical installations on worksites are explained in more detail on the Tukes website.

Request a quotation

Add to the quotation basket and send us your request – we will confirm availability and delivery time at the same time. You can see the full range in the product group.