tandem breaker aka cheaters

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Old 05-11-16, 11:41 AM
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tandem breaker aka cheaters

Hi everyone, i'm renovating my basement and would like to add a baseboard heater but ive only got 1 spot available in the panel and for a baseboards i wold need a dual 20amp breaker. I was wondering if anyone could tell me if my panel will allow for a tandem breaker. i tried looking but cant find a definite answer.

MANUFACTURER: SIEMENS
MFRPN#: SEQ24100SM
MAIN BREAKER TYPE
13 1/8 INCH W X 3 3/4 INCH D X 24 1/8 INCH H SIZE
48 MAX. NUMBER OF CIRCUITS
24 MAX. NUMBER OF SPACES
CSA APPROVAL
240 VAC VOLTAGE RATING
100 AMPERE CURRENT RATING
FLUSH/SURFACE COVER TYPE
NEMA 1 ENCLOSURE TYPE
 
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Old 05-11-16, 12:07 PM
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Spaces

48 MAX. NUMBER OF CIRCUITS
24 MAX. NUMBER OF SPACES
Is this not the answer? Others will follow.
 
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Old 05-11-16, 12:11 PM
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so that means all of them would support duplex ones then right? sorry not to up to snuff on electrical
 
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Old 05-11-16, 01:44 PM
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Yes, 24 space / 48 circuit means that all spaces may accept a tandem circuit breaker. It is not "cheating" to use tandems as the manufacturer included this option in the panel design.

DO understand that a tandem is on only one pole and therefore cannot supply a 240 volt load. You CAN use certain "quad" circuit breakers in two adjacent spaces as long as they have a "common internal trip" on the two CBs supplying the 240 volt load. You can use two single pole tandems in adjacent spaces to supply a "multi-wire branch circuit" provided you use an approved handle tie between the CBs to ensure all "hot" conductors in the MWBC are manually disconnected together.
 
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Old 05-11-16, 02:39 PM
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My 2 cents. I'm no electrician and not an expert. BUT! I had many tandem CB's and had to replace nearly all of them due to just plane old wear. IMHO they just can't stand the test of time with the everyday load.
 
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Old 05-11-16, 03:50 PM
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Quads and handle ties go against the KISS principle. Yes, they work but require some head scratching and are never in stock for emergencies.

Looks like that is a Canadian panel so may have some other rules.

Simply take two adjacent 15s for a tandem to free up a space - https://www.homedepot.ca/en/home/p.1...000406289.html

Then use standard 2 pole for your heater - https://www.homedepot.ca/en/home/p.2...000406297.html
 
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Old 05-11-16, 04:48 PM
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perfect thanks for the advice and info everyone. this is just a temp solution going to get the panel changed next year but this is a 40$ fix vrs a 2000$ for a new panel.
 
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Old 05-12-16, 06:55 AM
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That panel must not be in the US or is very new to allow that many circuits. The NEC limit was 42 including the main.
 
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