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In the layout design of emergency lighting systems, low voltage load wire runs must be of significant size to limit voltage drop in accordance with the National Electric Code to 5% of the nominal. To determine the correct wire size use the following formula and tables. |
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After calculating the circular mills required to carry the specified load at the allowable voltage drop, refer to the chart below to determine the wire size from the corresponding circular mill size, or use the tables below. |
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This table shows the maximum length of a given low voltage circuit, assuming that the total load is concentrated at the end of the load circuit. If loads are spaced at varying positions along the circuit length wire gauge distances may be increased, which in turn may permit cost savings by the use of a smaller wire size. |
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PDF Format Downloadable Data Sheet |
PDF Data Sheet |