MK Masterseal Plus range, a range of IP66-rated weatherproof box for sockets Terminals and switches that are perfect for outdoor applications or damp and dusty environments. In their brochure it says 13 amp. I bought mine back in Feb 2012 wiring between house and shed for a supply. So i don`t think it is meant for 30 amps. Mine has been outside in all weathers and has not leaked yet.

I am wanting black ones of these masterseal junction boxes part number k56506blk are you getting any of these ?.

I don't think that MK do a black version of this. I have only seen white and grey.

does this have a rear entry knockout

Yes, however, unlike the side access holes, it is not a push out plug, but an actual old school knock-out section. BUT, it is NOT in the center of the box, it is offset, so if you were to use it, it will make using the supplied connection hub somewhat difficult, if not impossible. If you need to use a rear entry point, i would drill a 20mm hole in the center using a small hole saw ans connect a suitable cable access gland or conduit connector., that way the cable will access in the middle of the connection hub supplied and it will be much more user friendly.

What size glands does it need

The knock-outs (one on each side) are M20, so they are for 20mm glands ! There is a knock-out on the back but it is off centre for some reason ! My installation was 'top' and 'side' and I had no problems. Hope that helps !

Mk Masterseal Plus K56506gry Junction Box Grey

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Description

🛠️ Master the elements with MK Masterseal Plus — where durability meets precision.

VERSATILE COMPATIBILITY - Seals securely around virtually any standard 13 amp plug, including molded plugs, enabling safe, reliable connections for all your outdoor and indoor appliances.
CONFIDENCE BUILT TO LAST - Backed by a 20-year guarantee and a broad product range, Masterseal Plus is the trusted choice for professionals demanding long-term reliability.
ENGINEERED FOR ENDURANCE - Crafted from tough recycled polycarbonate, this junction box resists UV fading, cracking, and extreme temperatures, maintaining flawless performance year-round.
PATENTED GEL SEAL TECHNOLOGY - Innovative gel seal fixed to the mounting frame guarantees a foolproof, rapid installation with zero risk of sealing errors.
UNRIVALED WEATHERPROOF DEFENSE - IP66 rating ensures total dust ingress protection and resistance to powerful water jets from any angle—perfect for the harshest environments.

The MK Masterseal Plus K56506GRY Junction Box is a premium, IP66-rated enclosure designed for superior protection against dust and high-pressure water jets. Constructed from UV-resistant recycled polycarbonate, it withstands extreme temperatures without cracking or fading. Featuring a patented gel seal for quick, error-free installation and compatibility with standard 13 amp plugs, it’s ideal for demanding indoor and outdoor environments. Supported by a 20-year guarantee, this junction box offers professional-grade durability and peace of mind.

Specifications

Asin	B004R9PPDM
Best Sellers Rank	496,913 in DIY & Tools (See Top 100 in DIY & Tools) 1,238 in Surface Mounted Junction Boxes 6,215 in Switches & Dimmers
Brand Name	Masterseal Plus
Colour	Grey
Customer Reviews	4.7 4.7 out of 5 stars (36) 4.7 out of 5 stars
Eu Spare Part Availability Duration	20 Years
Finish Type	Textured
Global Trade Identification Number	05017490581808
Installation Type	Screw-In
Item Weight	0.22 Kilograms
Manufacturer	MK
Material	Thermoplastic
Model Number	K56506GRY
Number Of Items	1
Part Number	K56506GRY
Specification Met	IP66
Style	Protection
Unit Count	1.0 count

Reviews

W**E

Well Designed Unit

Good solid sturdy junction box with connection Ring supplied, well thought out design and very easy to connect up tidily and then easy to see visually if all are connected correctly, does the job well. Unlike previous reviewer, no NEON in the box (didn't expect one as it's not supposed to have one, and there is no window to fit it behind anyway) only point to note really, no cable glands supplied, so you'll have to work out what you need and purchase them separately, not really an issue as there are a lot of cheap options out there for 20mm holes (which is what these are when you push out the blanking plugs.) Good price too when supplied with Amazon free shipping

22.05.2020

S**X

5 star

well constructed and was as sold..10/10.been outside for a while is definately waterproof..no hestiations in recommending....have to use four words more ~)

16.05.2014

P**Y

Usual high quality.

Used these many times, easy to wire and plenty of terminals .

13.08.2020

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C$5198

Duties & taxes included

In stock

Sold byAmazon NicaraguaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Nicaragua.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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