Delivering one 15A and one 30A circuit within a standard one-inch footprint, the Siemens Q1530NC tandem breaker maximizes capacity in crowded residential enclosures. This non-CTL plug-on breaker lacks a rejection clip, allowing it to mount into older pre-1968 ITE, Gould, and Siemens load centers. It also serves as an exact replacement for the discontinued MP1530N. Rated at 10 kAIC, it features reliable thermal-magnetic protection and is HACR rated for HVAC equipment.
What does the NC suffix indicate on the Q1530NC breaker?
The NC stands for Non-Circuit Total Limiting (Non-CTL). This indicates the breaker does not have a rejection clip, allowing it to be installed in older panels that do not restrict the placement of tandem breakers.
Which load centers accept the Q1530NC tandem breaker?
This Non-CTL breaker is compatible with legacy Siemens, ITE, and Gould load centers manufactured before 1968 that lack CTL rejection features. It is not compatible with modern CTL-compliant panels.
How much panel space does the Q1530NC require?
As a tandem breaker, it provides two independent circuits within a single 1-inch pole space, allowing you to maximize capacity in older, space-constrained load centers.
Do the two circuits on this tandem breaker share a common trip?
No. The 15A and 30A circuits operate independently. An overload or short circuit on one circuit will not cause the other circuit to trip.
Is it safe to install a Non-CTL breaker in a modern panel?
No. Non-CTL breakers are strictly for replacement use in older panels. Installing them in modern panels bypasses safety rejection features designed to prevent exceeding the maximum circuit capacity of the load center.
Can this breaker replace older ITE or Gould tandem breakers?
Yes, the Siemens Q1530NC is the direct manufacturer replacement for legacy Non-CTL tandem breakers used in pre-1968 ITE and Gould electrical panels.
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