According to California Electrical Code requirements for seismic installations, electrical equipment weighing more than how many pounds must be anchored or braced?
Correct Answer
C) 20 pounds
California Electrical Code Section 110.30 requires electrical equipment weighing more than 20 pounds to be anchored or braced to withstand seismic forces. This California-specific amendment to the NEC addresses the state's high seismic activity and ensures electrical systems remain functional during earthquakes, protecting both equipment and occupants.
Why This Is the Correct Answer
California Electrical Code Section 110.30 sets the threshold at 20 pounds — any electrical equipment exceeding this weight must be anchored or braced to withstand seismic forces. California amended the NEC to address the state's significant earthquake risk, ensuring equipment stays in place and systems remain functional during seismic events.
Why the Other Options Are Wrong
Option A: 35 pounds
35 pounds is incorrect. This threshold is too high and does not appear in CEC Section 110.30. Using 35 pounds would leave lighter but still hazardous equipment unanchored.
Option B: 50 pounds
50 pounds is incorrect. This is a common guess because it seems like a reasonable 'heavy' threshold, but the CEC sets the requirement much lower at 20 pounds to capture a wider range of electrical equipment.
Option D: 100 pounds
100 pounds is incorrect. This threshold would exempt most standard electrical equipment from seismic anchoring requirements, which directly contradicts California's intent to protect against earthquake damage.
Memory Technique
Think '20 = Earthquake Zone': California has 20% of U.S. earthquakes, and 20 pounds is the magic number. Or picture a 20-pound dumbbell — if your electrical equipment weighs more than a dumbbell, it must be anchored in California.
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