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1. Safety Standard IEC60335-1
IEC 60335-1:2010 deals with the safety of electrical appliances for household and similar purposes.
Table1 shows the comparison of requirement between IEC60335-1 and IEC60950-1 in terms of safety.
| # | Safety standard | IEC60950-1 | IEC60335-1 200V | IEC60335-1 100V | |
|---|---|---|---|---|---|
| Over voltage category | Ⅱ | Ⅱ | Ⅱ | ||
| 1 |
Isolation voltage *1 |
Input - Output | 3,000 | 2.4･U+2400 | 2,000 |
| Input - FG | 1,500 | 1.2･U+950 | 1,000 | ||
| Output - FG | (500) | - | - | ||
| 2 |
Creepage *2 |
200-250V *3 | 2.5/5.0 | 2.5/5.0 | 2.5/5.0 |
| 250-300V *3 | 3.2/6.4 | 4.0/8.0 | 4.0/8.0 | ||
| 300-400V *3 | 4.0/8.0 | 4.0/8.0 | 4.0/8.0 | ||
| 3 |
Clearance *2 |
150-250V *4 | 2.0/4.0 | 2.0/3.5 | 2.0/3.5 |
| 250-300V *4 | 2.0/4.0 | 2.0/3.5 | 2.0/3.5 | ||
| 300-400V *4 | 3.2/6.4 | - | - | ||
| 4 | Leakage current | Hand-held | 0.75mA | - | - |
| Movable | 3.5mA | - | - | ||
| Stationary | 3.5mA | - | - | ||
| Portable class I appliances | - | 0.75mA | 0.75mA | ||
| Stationary class I motor-operated appliances | - | 3.5mA | 3.5mA | ||
| 5 | Maximum temperature (Wire) | Type A | Less than 90℃ | - | - |
| Type E | Less than 105℃ | - | - | ||
| Type B | Less than 110℃ | - | - | ||
| 6 | Temperature increasing (Wire) | Type A | - | Less than 65deg | Less than 65deg |
| Type E | - | Less than 80deg | Less than 80deg | ||
| Type B | - | Less than 85deg | Less than 85deg | ||
*1:(U) Maximum working voltage
*2:(Basic isolation/Reinforced isolation)
*3:Listed voltage means working voltage.
*4:Listed voltage means working voltage in IEC60950-1, and rated input voltage in IEC60335.
2. IEC60335-1 compliance
(1) Creepage
Required creepage in IEC60335-1 is more strict than IEC60950-1 in some part.
(2) Temperature of wire
In IEC60950-1, type of wire is categorized by the absolute maximum temperature. In IEC60335-1, type of wire is categorized by the temperature increasing against temperature at 25ºC ambient temperature.
(3) Grounding capacitor
2pcs of Y1 grade grounding capacitors shall be used in series to comply with IEC60335-1.
(4) Safety approval
The creepage and temperature of wire are different depending on the product.
