fmtjfw
Senior Member
- Location
- Fairmont, WV, USA
Section/Paragraph: 110.4 Voltages.
New Text
110.4 Voltages.
Throughout this Code, the voltage considered shall be that at which the circuit operates. The voltage rating of electrical equipment shall not be less than the nominal voltage of a circuit to which it is connected. All voltages specified in this Code are nominal voltages unless explicitly prefixed with actual. Two systems of voltages are used as described in Table 110.4 Voltages. Voltages listed in a single row are meant to be used in the same circuit.
Table 110.4 Voltages
Substantiation
Voltages in this code are sometimes denoted "nominal" and sometimes not. I suspect that nearly all, if not all, voltages are "nominal voltages". It would be simpler to indicate that all voltages are nominal unless denoted "actual" and remove nominal from the text with the exception of the Article 100 definition of nominal voltage and the proposed changes to 110.4 herein.
Several voltage systems are used in this Code based on the ANSI-C84 standard, the NEMA device rating voltages, and motor rating. It is appropriate to indicate that 120V and 125V and other pairings denote the same "nominal" circuit voltage.
This submission needs to be coordinated with my "NEC ALL nominal" and "NEC ALL actual" submissions.
Inserted Deleted
New Text
110.4 Voltages.
Throughout this Code, the voltage considered shall be that at which the circuit operates. The voltage rating of electrical equipment shall not be less than the nominal voltage of a circuit to which it is connected. All voltages specified in this Code are nominal voltages unless explicitly prefixed with actual. Two systems of voltages are used as described in Table 110.4 Voltages. Voltages listed in a single row are meant to be used in the same circuit.
Table 110.4 Voltages
| Nominal | Device Rating | Motors |
|---|---|---|
| 120 | 125 | 115 |
| 240 | 250 | 230 |
| 480 | 460 | |
| 600 | 575 | |
| 2400 | 2300 |
Substantiation
Voltages in this code are sometimes denoted "nominal" and sometimes not. I suspect that nearly all, if not all, voltages are "nominal voltages". It would be simpler to indicate that all voltages are nominal unless denoted "actual" and remove nominal from the text with the exception of the Article 100 definition of nominal voltage and the proposed changes to 110.4 herein.
Several voltage systems are used in this Code based on the ANSI-C84 standard, the NEMA device rating voltages, and motor rating. It is appropriate to indicate that 120V and 125V and other pairings denote the same "nominal" circuit voltage.
This submission needs to be coordinated with my "NEC ALL nominal" and "NEC ALL actual" submissions.
Inserted Deleted