What this document is
Phase II of the 2012 Compulsory Registration Order added items 16 to 30 to the original 15 products. This document sets out how models of those products can be grouped into a series for testing. Revision 6 is dated 28 February 2019 and is five pages long.
Our CRS registration guide has always pointed to this document when it explains series testing. This page sets out what is in it.
Grouping criteria by product
For many items a range of output power or capacity can sit in one series, as long as the design stays the same in the ways listed. “Same enclosure” allows for differences in decorative parts.
| Item | Product | Models can share a series if they have the same… |
|---|---|---|
| 16 | Power adaptors for IT equipment | Rated input voltage, class of construction, mains PCB layout and transformer (range of output power allowed) |
| 17 | Power adaptors for audio, video and similar apparatus | As for item 16 |
| 18 | UPS and inverters up to 5 kVA | Input and output voltage, frequency and phases, cabinet and class of construction, power transformer, PCB layout and battery bus voltage |
| 19 | LED control gear (DC or AC supplied) | Input voltage, class of construction and SELV/non-SELV class. Three samples (highest, interim, lowest rating) are tested, and up to three enclosure designs are preferably covered |
| 20 | Sealed secondary cells and batteries | Nominal voltage, cell construction design, electrodes and electrolyte |
| 21 | Self-ballasted LED lamps | Input voltage, driver rating, mains PCB layout and cap design |
| 22 | Fixed general purpose LED luminaires | Class of construction, input voltage of the registered or integral control gear, and enclosure material. Fancy lights and chandeliers have their own rules, below |
| 23 | Mobile phones | Battery capacity, charging voltage and current, battery-side PCB layout, adaptor and a similar enclosure |
| 24 | Cash registers | Input voltage, current or wattage, class of construction, mains or SMPS layout, transformer, enclosure and battery type |
| 25 | Point of sale terminals | Input voltage, current or wattage, class of construction, ingress protection, mains PCB layout and battery type |
| 26 | Copying machines and duplicators | Input voltage, current or wattage, copying system, largest paper size, mains or SMPS layout, transformer and enclosure |
| 27 | Smart card readers | Input voltage, current or wattage, contact or contactless type, mains or SMPS layout, transformer, enclosure and battery |
| 28 | Mail processing, postage and franking machines | Input voltage, current or wattage, mains or SMPS layout, transformer and enclosure |
| 29 | Passport readers | As for item 28 |
| 30 | Power banks | Input voltage, ingress protection, PCB layout, cell type, enclosure material, plus class of construction (external adaptor) or charging circuit (built-in adaptor). A range of capacities is allowed |
This table is our summary. The PDF has the full wording.
Fancy lights and chandeliers
Item 22 has a separate set of rules for decorative luminaires, because models change often and are rarely given model numbers. Only the housing and the electrical part up to the driver are considered when forming the series. Three samples covering the highest, an interim and the lowest rating are tested. A picture of each electrical fitting in the series goes into the test report, so the laboratory does not need a physical sample of every model.
How many models per series
- Up to 10 models per series, as the general rule.
- Up to 20 models for sealed secondary cells and batteries (item 20).
- Up to 50 models for fancy lights and chandeliers (item 22).
- One sample per series unless stated otherwise, and it must be the worst case from a safety-design point of view.
Status in 2026
Power adaptors, mobile phones, cash registers, POS terminals, copiers, smart card readers, franking machines, passport readers and power banks are among the products moving to IS/IEC 62368-1:2023, with concurrent running until 1 November 2028. See the BIS migration guideline and the migration FAQs. The LED, UPS and battery items are tested to their own standards and are not part of that migration, although several of those standards have been revised separately.