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21 Way Insulated Enclosure - for up to 19 MCBs

  part of  MK Insulated Consumer Unit Enclosures
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21 Way Insulated Enclosure - for up to 19 MCBs 5017490347893  K5621S MAG  
21 Way Insulated Enclosure - for up to 19 MCBs

16 way shown as example

Supplied less MCB's / Mains Switch

DIMENSIONS: K5621s
468 x 230 x 110mm
(width x height x depth)
MK Sentry
21 Way Insulated Enclosure - for up to 19 MCB s
Accepts
21 One Module Products
or 1 Two Module ( Main Switch or RCD ) Not Included
and 19 One Module Products
C/w 3 x Integral Neutral Bars - Linked
Surface Mounting

  • All units are magnolia coloured.
  • All units feature a robust base together with an all over front cover moulded in an impact resistant, flame retardant thermoplastic and a polycarbonate lid. Cable entry points are located on top, bottom, side and rear surfaces.
  • Degree of protection to BS EN 60529 to IP2X C.
  • Precautions must be taken to maintain the IP rating, e.g. use of cable glands and knockouts.
  • BS EN 60439-3: 1991/A1: 1994.
  • Cover mounted blanks are supplied with ALL consumer units
    (2 off for 4, 8 and 12 module and
    4 off for 16 and 21 module)
Technical: Full Details and Specification and IP Rating Chart 
Order Code Description Price (ex vat) Qty    
MK 562121 Way Insulated Enclosure - for up to 19 MCBs
EA
16.40
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Related items you may need.
Std MCBs for MK Sentry S Boards
product photo
MK Sentry MCB's ( Type B )
General Domestic Consumer Unit use

Sentry MCB detect overcurrents due to both overload and fault currents.
The MCB will operate and interrupt the supply to prevent damage to the installation.
Click the order code for AccessoriesTechnical: MCB Selection and Full Details and Specification 
Order Code Description Price (ex vat) Qty    
MK 5544Blank for Sentry Consumer Unit
EA
0.57
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MK 5903S3 Amp MK MCB ( Special Offer )
EAEA 10+
2.642.54
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MK 5906S6 Amp MK MCB ( Special Offer )
EAEA 10+
2.652.54
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MK 5910S10 Amp MK MCB ( Special Offer )
EAEA 10+
2.652.54
graphic
MK 5916S16 Amp MK MCB ( Special Offer )
EAEA 10+
2.652.54
graphic
MK 5920S20 Amp MK MCB ( Special Offer )
EAEA 10+
2.652.54
graphic
MK 5932S32 Amp MK MCB ( Special Offer )
EAEA 10+
2.652.54
graphic
MK 5940S40 Amp MK MCB ( Special Offer )
EAEA 10+
2.652.54
graphic
MK 5945S45 Amp MK MCB ( Special Offer )
EAEA 10+
2.652.54
graphic
MK 5950S50 Amp MK MCB ( Special Offer )
EAEA 3+
2.722.61
graphic
BK GCDCircuit Detail Labels - pack of 25 - NICEIC
EA
7.25
graphic
CG PLPadlock and Locking Device for Mcb's and Rcbo's
EA
3.75
graphic
MK Sentry MCB's ( Type C )
product photo
MK Sentry MCB's ( Type C )
Technical: MCB Selection and Full Details and Specification 
Order Code Description Price (ex vat) Qty    
MK 87066 Amp MK MCB C Type - Motor Rated
EAEA 10+
2.652.54
graphic
MK 871616 Amp MK MCB C Type - Motor Rated
EAEA 10+
2.652.54
graphic
MK 873232 Amp MK MCB C Type - Motor Rated
EAEA 10+
2.652.54
graphic
CG PLPadlock and Locking Device for Mcb's and Rcbo's
EA
3.75
graphic
Mk Sentry RCBOs
product photo

MK 6936
MK Sentry RCBO's

6900 series has been replaced with 7900 series
6 Amp to 32 Amp - Oct 2009
An RCBO is a combination of an MCB and RCD
This enables both overcurrent protection and earth fault current protection by a single unit.

Single module Sentry RCBOs may be installed anywhere along the length of the busbar and will occupy one outgoing way.

They are suitable also for installation in Sentry Consumer Units and in Sentry two or four module enclosures.

The current carrying capacity of the cable should always exceed the current rating of the MCB.


  • 7900 series replaced the 6900 series - Oct 2009
  • They are interchageable with each other (However the switches do not align exactly with the old MCB' & RCBO's)
Click the order code for AccessoriesTechnical: Full Details and Specification 
Order Code Description Price (ex vat) Qty    
MK 693740 Amp 30mA RCBO - MK ( Clearance Stock )
EA
24.95
All Sold
MK 693845 Amp 30mA RCBO - MK
EA
24.95
Discontinued
MK 693950 Amp 30mA RCBO - MK
EA
24.95
Discontinued
Image Order Code Description Price (ex vat) Qty    
product photoMK 5500100 Amp Main Switch for Sentry Consumer Unit
EA
8.15
graphic
product photoMK 5544Blank for Sentry Consumer Unit
EA
0.57
graphic
product photoMK 578080 Amp 30mA RCD 2 Pole - MK
EA
51.60
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