Hoʻohana ʻia ka huahana no ka pale ʻana i ka overload a me ka pōkole pōkole ma ke kaapuni hoʻomālamalama a ua like nā huahana me nā kūlana GB10963 a me BS3871.
| Hapaiia i keia manawa | Ka helu o ka pou | Volta koho | Ka hikiwawe |
| 6.10.15.20.30.40.50.60 | 1 | 120-240 | 3000 5000 |
| 15.20.30.40 | 2 | 240-415 120-240 | 3000 5000 |
| 50.60 | 3 | 240-415 240-415 | 3000 3000 |