| Year | 1930 |
| Date | 23-Oct |
| Volume | 63 |
| Issue | 1,537 |
| Page | 400 |
| Category | Electrical |
| Part | |
| Title | Modern Electrical Installation Work |
| Author | Frederick H.Taylor |
| Notes | Extensions, systems of charging, the flat rate system, the maximum demand rate, the "telephone" or "contract" rate system |