The neutral conductor may be currently connected, but only under the conditions specified in the SEC. 310.15 (e). Equipment grounding connectors are absolutely not currently (Article 310.15 (f)).
When race devices or cables are exposed to direct sunlight and are less than 3/4 inch. Above the ceiling, a temperature of 60 degrees Fahrenheit (33 ° C) should be added to the surrounding temperature in the open air to determine the surrounding temperature correction for each table 310.15 (b) (1).
Amended by ampacity
When you are four or more connectors that carry the current in a race or cable, the corrosion must be modified in the 310.16 table in a 90 ° C per CE for a table 310.15 (c) (1).
When the cables are assembled without maintaining the spacing for more than 24 inches, the connected atoms contained in Table 310.16 should be modified in a 90 ° C column per table 310.15 (c) (1).
Table 310.15 (C) (1) (1) (1) does not apply to connectors in the AC or Type MC cable under all the four conditions listed in a second. 310.15 (c) (1) (d). For example, cables do not have an external jacket.
The neutral conductor of the 3-Ware system, mono-phase, 120 volts/240 volts, or 4-ware system, three stages, 120 volts/208 V or 277V/480V, and the supply of linear loads (1) (1) (1) (1) (1) (1) (1) (1).
The neutral conductor of the 3-wire system and 3 stages and WYE connecting a conductor currently bearing the Ampacity conduct for each table 310.15 (c) (1) (Article 310.15 (H) (2)).
On the 4 -wire wire circuit, 3 phases, where the main part of pregnancy consists of non -linear loads, the neutral conductor is currently conducting the conductor of the adjustments on Table 310.15 (C) (1) (Article 310.15 (E) (3).
Equipment grounds and interconnections that have been urged on the current are not considered to be considered to adjusts the capacity of the conductors for each table 310.15 (c) (1) (Article 310.15 (and)).
The effects of conductors in races, cables, or buried directly (specified in Table 310.16) depend on the four conditions listed in a second. 310.16. For example, there are no more than three connectors currently carrying.
Prevention of violation
Correcting violations of the connector can be expensive, not only because of the massive work concerned, but also due to the delay in completing the project. Most errors are the result of incorrect use of tables. Check the table address to make sure you have the right table, and read the table notes carefully.
Always choose the temperature column that matches the appointed connector insulation classification in question and does not exceed the system of the device’s expiry temperature. If you have a 90 degree connector and finish 60 degrees, you should use a 60 -degree column.
