Branch Circuits & WiringQuestion 219 of 521
Per 334.30, Type NM cable must be secured and supported at intervals not exceeding what distance along the run?
a.3 ft (900 mm)
b.6 ft (1.8 m)
c.4-1/2 ft (1.4 m)
d.10 ft (3.0 m)
Explanation
Section 334.30 requires NM cable to be secured at intervals not exceeding 4-1/2 ft, and within 12 in of every box or fitting. 6 ft is the MC interval, while 3 ft and 10 ft are not NM support values.
Law Reference: 2023 NEC §334.30Practice all 521 questions free — no signup required.
Related questions on this topic
- Per 334.80, the ampacity of Type NM (nonmetallic-sheathed) cable is based on which temperature column of Table 310.16?
- For Type NM cable, the 90°C rating of its conductors may be used for what purpose?
- A 12-2 Type NM cable (two 12 AWG conductors plus ground) is used for a general branch circuit. Using the required NM temperature column, what is the ampacity of its 12 AWG conductors?
- Per 334.12, which of the following installations is NOT permitted for Type NM cable?
- Per 330.30, Type MC cable must be supported and secured at intervals not exceeding what distance?
- Which statement about Type MC cable ampacity is correct?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against California CSLB C-10 Electrical Trade Examination · How we review