2011

Fill tables
When multiple current carrying wire conductors are in the same conduit,
duct, or raceway, the wire ampacity may need to be de-rated. Current carrying
wire conductors are defined as power wiring, not ground, neutral, or control
wires. The Fill table provides the de-rating factor based on the maximum
number of power wire conductors.
The FILL table follows this naming convention:
■ FILL - the table name prefix.
■ _{standard} - optional suffix to relate it to a specific electrical standards
code. For example, an “_NEC” suffix could mean that the data for the table
parallels the National Electrical Code. A suffixed FILL table name is not
necessary unless you plan to set up the electrical standards database to
support multiple standards.
678 | Chapter 9 Circuits