| Year | 1924 |
| Date | 06-Nov |
| Volume | 51 |
| Issue | 1,228 |
| Page | 522 |
| Category | Electrical |
| Part | 3 |
| Title | Two Useful Switchboards |
| Author | H.A.Clark |
| Notes | Switchboard with aerial and earth controls and lightning arrester, switchboard carrying ammeter, fuse and current control switches |