Built for commercial applications, this 30A, three-pole circuit breaker delivers essential overcurrent protection. It belongs to the legacy Square D Q1 series. Designed with a plug-on mounting style, it installs into older Q1 and NQO panelboards. It helps maintain existing systems, though it has been replaced by the QO330. The unit features a 10kAIC rating at 240VAC and accepts 14-8 AWG wiring. A Visi-Trip window helps electricians quickly identify tripped circuits during outages.
Which panelboards accept the Square D Q1330 circuit breaker?
This legacy Q-Frame breaker is specifically designed to plug into older Square D Q1 load centers and NQO panelboards. It provides an exact physical fit for aging infrastructure where modern breakers may not align correctly.
Can I use a standard QO breaker instead of the Q1330?
While modern installations often use the QO330 as a replacement, the Q1330 is a wider legacy format at 1 inch per pole. Using this original Q1 breaker ensures a proper physical fit in older Q1 and NQO enclosures without requiring retrofitting or adapters.
What wire gauge is required for installing the Q1330?
The lug terminals accommodate 14 AWG to 8 AWG wire. Both aluminum and copper conductors are supported, making it versatile for existing panel wiring.
What type of protection does the Q1330 thermal-magnetic trip unit provide?
The fixed thermal-magnetic mechanism delivers long-time protection for sustained overloads and instantaneous protection to quickly clear short circuits up to 10kA at 240V AC.
How can I tell if the Q1330 has tripped during an overcurrent event?
This breaker features a Visi-Trip window that provides a clear visual indicator, allowing electricians to quickly identify a tripped circuit during an outage.
Is the Q1330 suitable for use with HVAC equipment?
Yes, this breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment that requires overcurrent protection.
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