Waterproof Junction Box Test - Compare. Com 2024

Power connections need special protection

Junction boxes are essential in the distribution or connection of electrical equipment. They protect the connection cables wired on terminals against accidental contact, mechanical interference, dust or even water.

If you need junction boxes for your outdoor installation, in or on the water, you must use them in a water-protected version, because the interaction of electricity and water can be life-threatening. That's why we did that once Offer of water-protected junction boxes to explain the most important purchase criteria when you buy them.

Top product: Waterproof junction box at Amazon

The waterproof junction box guide

Waterproof junction boxes are especially useful when in contact with water. They are suitable for all outdoor installations, for illuminated billboards, garden and pond lighting, the Teichschlammsauger or for the garden pump can submersible pump or Swimming pool. Also for vehicles or ships watertight junction boxes are needed or for the connection of your Water computer or House waterworks. In all, the special protection against moisture is regulated by an IP code, according to DIN EN 60529 (VDE 0470-1): 2014-09 enclosure protection. All wet room junction boxes must be screwed. For the cable entries, rubber sleeves or glands are required. Only then can penetrating water be prevented. On the market are models with glands, also called PG glands or metric cable glands. The latter are being used more and more, as the cable ducts have been converted to metric dimensions in the installation area.

Degree of protection is not the same degree of protection

Waterproof does not mean that at the same time the best watertight junction boxes can safely lie in the water. The corresponding degree of protection must always be observed. This IP code provides information on the extent to which switches, sockets etc. are protected against foreign objects and water or against contact. The code is made up of the letters IP and two appended code numbers.

• Reference - Protection against foreign bodies and protection against contact
• Reference - Protection against water

IP code 1. digit	Foreign Bodies	contact protection
0	No protection	No protection
1	Foreign body ø ≥ 50 mm	With the back of the hand
2	Foreign body ø ≥ 12,5 mm	With your fingers
3	Foreign body ø ≥ 2,5 mm	With tools
4	Foreign body ø ≥ 1 mm	With a wire
5	injurious amount	Complete protection
6	dustproof	Complete protection

IP code 2. digit	Protection against water
0	No protection
1	Protection against dripping water
2	Protection against dripping water, with inclined housing up to 15 °
3	Protection against dripping water, vertical to 60 °
4	Protection against splashing water from all sides
5	Protection against water jets from all sides (nozzle)
6	Protection against strong jet water
7	Protection against temporary submersion
8	Protection against permanent submersion

Which cable for a waterproof junction box?

In the first place are waterproof junction boxes for underground cables suitable. It can be installed both in the ground and outdoors, indoors, cable ducts or in water. Heavy rubber hose lines are also for waterproof junction boxes cheap, although they may be used in damp or wet rooms, but they are suitable not for the relocation of waterproof junction boxes in the ground or in the water.

Also pay attention to the diameter of the cable, because it has to be clamped firmly through the screw connection.

cable type	Diameter*	cable type	Diameter*
NYY-J 3 x 1,5 mm²	11,5 mm	NYY-J 5 x 1,5 mm²	13 mm
NYY-J 3 x 2,5 mm²	12,5 mm	NYY-J 5 x 2,5 mm²	14,5 mm
NYY-J 3 x 4 mm²	14 mm	NYY-J 5 x 4 mm²	16,5 mm

The following rubber hose lines are suitable:

cable type	Diameter*	cable type	Diameter*
H07RN-F 3 x 1,5 mm²	11,5 mm	H07RN-F 5 x 1,5 mm²	14,4 mm
H07RN-F 3 x 2,5 mm²	14 mm	H07RN-F 5 x 2,5 mm²	17 mm
H07RN-F 3 x 4 mm²	16,2 mm	H07RN-F 5 x 4 mm²	19,9 mm

Is there a watertight junction box review?

Unfortunately, neither at the Stiftung Warentest nor at Öko Test or MyHammer we have such tests waterproof junction boxes test winner found. Therefore, you must rely on your common sense when questioning which waterproof junction box I need? Maybe our guide has been able to answer one or two questions.

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Where can I buy waterproof junction boxes?

Although we always point out in our comparisons that there is this or that in the relevant hardware stores to buy, we must refer to these articles that you your buy waterproof junction boxes online should. In the hardware stores you will not find a very large assortment and waterproof professional junction boxes certainly not. If necessary, you will find a lot in pool shops or in the special trade. But why not go looking for it when Internet trading comes in and 24 has hours open?

Our conclusion to the waterproof junction box

A watertight junction box is a must when it comes to wet or wet outdoor installations. Always pay attention to the degree of protection of the articles when it comes to wet rooms, because with electricity and water should always be the safety in the foreground.