Type D vs. Type I
Comparing 2 standards across 5 specifications. 5 key differences identified.
Type D is the old British 5A standard (BS 546, 1934) -- three large round pins in a triangle. It predates and is completely incompatible with the UK's later Type G, and remains the primary domestic standard in India, Nepal, and Sri Lanka today.
Type I, the Australian/New Zealand standard, uses two flat pins angled in a V-shape plus a flat earth pin. China and Argentina use dimensionally similar but genuinely incompatible variants -- Chinese plugs don't physically fit, and Argentine plugs fit but with reversed polarity.
Specification Comparison Table
5 Parameters| Parameter / Spec | ||
|---|---|---|
|
Pin Count
|
3 round pins in a triangle (large, non-coplanar sizing) | 2 flat pins in an inverted V + 1 flat earth pin |
|
Rated Current
|
5 A | 10 (15A, 20A, 25A, and 32A variants also exist) A |
|
Rated Voltage
|
250 V | 230 V |
|
Grounded
|
Yes | Yes (2-pin ungrounded version also exists for double-insulated devices) |
|
Common Regions
|
India, Nepal, Bhutan, Sri Lanka, Namibia, and roughly 40 countries with British-influenced history | Australia, New Zealand, Fiji, Tonga, Papua New Guinea, Solomon Islands |