Ana amfani da samfurin don kare nauyin nauyi da gajeriyar kewayawa a cikin kewayar haske kuma samfuran sun yi daidai da ka'idodin GB10963 da BS3871.
| rated halin yanzu|A) | Yawan sanda | Ƙarfin wutar lantarki | Karya iya aiki |
| 6.10.15.20.30.40.50.60 | 1 | 120120/240 | Farashin 50005000 |
| 15.20.30.40 | 2 | 240/415120/240 | Farashin 30005000 |
| 50.60 | 3 | 240/415240/415 | Farashin 30003000 |