DN72 Series 20A DP Switch

SPECIFICATIONS

DP vs SP Switch — When Full Isolation Is Required for Water Heaters

Three Premium Panel Finishes — A 20A DP Switch That Matches Your Interior

Electric water heater isolation switch with double pole meets BS 20A standard. The panel is made out of either PC, glass, or aluminum.

The DN72324 is a UK standard double pole 20A switch designed exclusively for using as a water heater switch and a double pole isolator in fixed appliance circuit applications. When used in this application, the 20A double pole switch disconnects both neutral and live conductors, thanks to its design, from current supply unlike a single pole electrical switch for lighting; thus making it a safe device for water heaters, immersion heaters, air conditioners, and fixed kitchen equipment. Three premium panel materials are offered in this model: PC for budget-friendly volume production, solid glass for glossy finish with fingerprint-resistance, or brushed stainless steel for industrial look and feel. The red copper switch with silver alloy touch point of Φ3.0×25 mm supports switching of up to 20A and ensures satisfactory arc management while executing switches. With 88×86 mm profile, the panel features compatibility with standard British back-boxes. The switch is available in either steel middle plate or plastic-coated steel. The product is IEC certified for Britain standards, with 12-year warranty and minimum quantity of 20 GP containers.

As a water heater switch producer, we are unique in that we sell directly to our customers and also offer a competitive pricing for wholesale, the option to use OEM branding on a panel of your choice, and a lengthy 12-year warranty on products from the DN72 series.

20A DP Isolation — The Correct Specification for Water Heaters and Fixed Appliances

The specifications of this water heater double pole switch are compliant with the requirements of the UK and Commonwealth electrical regulations for local full disconnection. In the case of water heaters and immersion heaters the DP switch is essential as it provides complete isolation of the equipment, which is vital for simple maintenance as well as for emergency shut off. The same applies to air conditioning units where the DP isolator ensures disconnecting both live and neutral wires before the servicing begins. For the kitchen appliances such as integrated ovens and induction hobs DP switch is used to show that the circuit is completely dead to both users and maintenance staff. The red color copper bus bar and Φ3.0×25mm silver alloy contact point are created for 20A switching with the minimum amount of arc energy produced during on-and-off operations under full load condition. The structural rigidity of the thin 88×86 mm panel is ensured by the steel or plastic-coated steel middle plate.

Matching the DN72 Series — 20A DP Switch in PC, Glass, or Aluminum

The DP switch from the PC glass aluminum series belongs to the DN72 series, which has the same slim dimensions of 88×86 mm and three-panel finishes as the DN72 switches. The DN72324 water heater switch can be installed with the DN72 single and double switches in the same room. The DN72 series switches can be used in the same installation with the same design, the same materials, and colors. It has a size of 88×86 mm, which fits the British back boxes used all over the UK, Kuwait, Saudi Arabia, GCC countries, and Malaysia. The order quantity is container-level supply (20GP MOQ) of PC-glass-aluminum switches combined with different finishes. The finish colors are White, Gold, Grey, and Black.

Factory-Direct Supply for Wholesale & OEM Partners

Buyer’s Guide

Where to Specify a 20A DP Switch: Water Heaters, AC Units & Fixed Appliances

A practical guide to identifying DP isolator applications, panel material selection, and wiring for British standard installations.

Where Is a 20A DP Switch Required?

According to UK and Commonwealth regulations, some fixed appliance circuits demand the use of a local 20A DP isolator. For the maintenance of water heaters and immersion heaters DP isolation is required, something that the DN72324 water heater switch offers, providing a clear point of complete disconnection. Air conditioning units also benefit from DP isolation in the process of maintenance. Ovens and electric hobs have to have an easily accessible visible DP switch. Additionally, commercial kitchen appliances require full disconnection for cleaning and maintenance purposes. Simply having a single‑pole light switch does not comply with any requirements for the applications above, since it is only DP switches that can guarantee complete isolation of live and neutral circuits for different installation applications.

Panel Material Selection — PC, Glass, or Aluminum?

PC panel: An economical and robust choice, the plastic option is a common option for housing and industry projects. The laminated glass option offers a polished and smooth glass finish with the ability to repel fingerprints, making it ideal for high-end housing and hotels. The brushed aluminum option has an industrial aesthetic which is resistant to scratches, making it suitable for cutting-edge commercial interiors or modern housing projects. All three come with identical dimensions of 88X86 mm, come with 20A DP mechanism and have a warranty period of 12 years.

Wiring & Installation

There are four primary connections to the DN72324 — the supply live wire, the output live wire, the supply neutral wire, and the output neutral wire including one extra terminal for earth continuity. Since the device is rated at 20A it is prudent to use the appropriate size of cable for the supply which is generally 2.5mm² for short runs. The device is designed to fit British standard back boxes of size 86mm. Be sure to isolate the circuit at the consumer unit before beginning work and check for adequate torque in all connections to support the maximum current rating of 20A.

Frequently Asked Questions

What is a 20A DP switch used for?

A switch of double pole type rated at 20 ampere cannot be used for any appliance capable of being controlled by a 20A double pole switch, as the appliance in question needs complete cut off from live and neutral wires. It usually includes electrical appliances like a dishwasher, water heater and even an oven. DN72324, which is the name of double pole switch of 20 ampere type, has been designed according to the British Standards and is easily recognizable.

What is the difference between a DP switch and a standard light switch?

In the case of a regular light switch, it is only single pole, which means that only the live wire is disconnected leaving the neutral connected. A DP (double pole) switch, such as DN72324, allows simultaneous breakage of both live and neutral wires with total disconnection of current. This is demanded as per certain regulations concerning electrical appliances. Wrong wiring would be to fix a single pole switch in a place of double pole switch.

What panel materials are available for this 20A DP switch?

The DN72324 comes in three premium finishes: PC (high-strength polycarbonate, cost-efficient in mass production), tempered glass (glossy, easy to clean, perfect for upscale interiors), and brushed aluminum (metallic industrial look, resistant to scratches and ideal for modern business environments). All these three designs share the same slim size, 88 mm x 86 mm frame, contact mechanism in red copper and silver, and offer a warranty period of 12 years.

Can this DP switch be used as a water heater isolator?

Yes, the DN72324 is a designated water heater switch and DP isolator. It fulfills the regulatory requirement for a local point of complete disconnection of water heaters and immersion heater systems. It has a rating of 20A, which is sufficient for domestic water heaters of up to about 4.8kW at 240V. If you’re working with appliances that consume more power like electric showers or bigger immersion heaters, then you might at least need a 45A DP switch.