Can I replace two Siemens QP type, handle tied, single pole 15 amp breakers with a tandem QT type in the same configuration?
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Our Siemens electrical panel has two single pole 15 amp QP type breakers, with a handle tie that are together powering a mini-split HVAC system. One breaker has the white neutral line into it (wrapped in black tape as appears to be expected) and the other has black hot line.
Can I replace these with a tandem 15 amp QT type Siemens breaker (edit: specifically, model Q1515U)? Assuming I use a handle tie (model ECQTH2, which it looks like qualifies as a common trip for those breakers) and wire it with the same neutral line in one and hot line in the other.
Edit: fwiw, this panel does support tandems in every slot
Photo of the current breaker if it's helpful:
circuit-breaker
asked 4 hours ago
jbiscuit
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up vote
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Our Siemens electrical panel has two single pole 15 amp QP type breakers, with a handle tie that are together powering a mini-split HVAC system. One breaker has the white neutral line into it (wrapped in black tape as appears to be expected) and the other has black hot line.
Can I replace these with a tandem 15 amp QT type Siemens breaker (edit: specifically, model Q1515U)? Assuming I use a handle tie (model ECQTH2, which it looks like qualifies as a common trip for those breakers) and wire it with the same neutral line in one and hot line in the other.
Edit: fwiw, this panel does support tandems in every slot
Photo of the current breaker if it's helpful:
circuit-breaker
asked 4 hours ago
jbiscuit
82
New contributor
jbiscuit is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Handle ties don't provide common trip. Handle ties provide common maintenance shutoff only. Internal mechanisms within the breaker cause common trip. Therefore for a 240V or 120/240 load, you must use a 2-pole breaker or a quadplex. Handle-ties are for MWBC.
– Harper
1 hour ago
add a comment |Â
up vote
1
down vote
favorite
up vote
1
down vote
favorite
Our Siemens electrical panel has two single pole 15 amp QP type breakers, with a handle tie that are together powering a mini-split HVAC system. One breaker has the white neutral line into it (wrapped in black tape as appears to be expected) and the other has black hot line.
Can I replace these with a tandem 15 amp QT type Siemens breaker (edit: specifically, model Q1515U)? Assuming I use a handle tie (model ECQTH2, which it looks like qualifies as a common trip for those breakers) and wire it with the same neutral line in one and hot line in the other.
Edit: fwiw, this panel does support tandems in every slot
Photo of the current breaker if it's helpful:
circuit-breaker
asked 4 hours ago
jbiscuit
82
New contributor
jbiscuit is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Our Siemens electrical panel has two single pole 15 amp QP type breakers, with a handle tie that are together powering a mini-split HVAC system. One breaker has the white neutral line into it (wrapped in black tape as appears to be expected) and the other has black hot line.
Can I replace these with a tandem 15 amp QT type Siemens breaker (edit: specifically, model Q1515U)? Assuming I use a handle tie (model ECQTH2, which it looks like qualifies as a common trip for those breakers) and wire it with the same neutral line in one and hot line in the other.
Edit: fwiw, this panel does support tandems in every slot
Photo of the current breaker if it's helpful:
circuit-breaker
circuit-breaker
asked 4 hours ago
jbiscuit
82
New contributor
jbiscuit is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 hours ago
jbiscuit
82
New contributor
jbiscuit is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 hours ago
jbiscuit
82
New contributor
jbiscuit is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 hours ago
jbiscuit
82
asked 4 hours ago
jbiscuit
82
82
New contributor
jbiscuit is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
jbiscuit is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
jbiscuit is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Handle ties don't provide common trip. Handle ties provide common maintenance shutoff only. Internal mechanisms within the breaker cause common trip. Therefore for a 240V or 120/240 load, you must use a 2-pole breaker or a quadplex. Handle-ties are for MWBC.
– Harper
1 hour ago
add a comment |Â
Handle ties don't provide common trip. Handle ties provide common maintenance shutoff only. Internal mechanisms within the breaker cause common trip. Therefore for a 240V or 120/240 load, you must use a 2-pole breaker or a quadplex. Handle-ties are for MWBC.
– Harper
1 hour ago
Handle ties don't provide common trip. Handle ties provide common maintenance shutoff only. Internal mechanisms within the breaker cause common trip. Therefore for a 240V or 120/240 load, you must use a 2-pole breaker or a quadplex. Handle-ties are for MWBC.
– Harper
1 hour ago
Handle ties don't provide common trip. Handle ties provide common maintenance shutoff only. Internal mechanisms within the breaker cause common trip. Therefore for a 240V or 120/240 load, you must use a 2-pole breaker or a quadplex. Handle-ties are for MWBC.
– Harper
1 hour ago
add a comment |Â
2 Answers
2
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votes
up vote
1
down vote
accepted
NO. Your current configuration puts each hot on a different leg, resulting in 240 volts (120+120). The tandem breaker you’re proposing puts both hots on the same 120 volt leg. This will result in zero volts across the hots. If this were a multi-wire branch circuit, you’d end up with double current on the neutral.
What you could use is a compatible quad breaker (4 breakers in the space for two) with appropriate handle ties to produce two 240 volt circuits or one 240 and two 120s.
answered 2 hours ago
DoxyLover
2,7941715
Thank you! I'm trying to install two new 20A circuits for exterior outlets, and it doesn't look like Siemens makes a quad with 15A double pole inside and 20A single poles outside, so I'll have to find another way to do it.
– jbiscuit
2 hours ago
add a comment |Â
up vote
1
down vote
Handle ties don't provide common trip. Handle ties provide common maintenance shutoff only. Handle-ties are mainly for MWBCs, which do not require common trip.
Internal mechanisms within the breaker cause common trip, and two separate breakers just can't do that thing.
Therefore for a 240V or 120/240 load, you must use a 2-pole breaker or a quadplex.
answered 57 mins ago
Harper
57.4k335116
add a comment |Â
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
accepted
NO. Your current configuration puts each hot on a different leg, resulting in 240 volts (120+120). The tandem breaker you’re proposing puts both hots on the same 120 volt leg. This will result in zero volts across the hots. If this were a multi-wire branch circuit, you’d end up with double current on the neutral.
What you could use is a compatible quad breaker (4 breakers in the space for two) with appropriate handle ties to produce two 240 volt circuits or one 240 and two 120s.
answered 2 hours ago
DoxyLover
2,7941715
Thank you! I'm trying to install two new 20A circuits for exterior outlets, and it doesn't look like Siemens makes a quad with 15A double pole inside and 20A single poles outside, so I'll have to find another way to do it.
– jbiscuit
2 hours ago
add a comment |Â
up vote
1
down vote
accepted
NO. Your current configuration puts each hot on a different leg, resulting in 240 volts (120+120). The tandem breaker you’re proposing puts both hots on the same 120 volt leg. This will result in zero volts across the hots. If this were a multi-wire branch circuit, you’d end up with double current on the neutral.
What you could use is a compatible quad breaker (4 breakers in the space for two) with appropriate handle ties to produce two 240 volt circuits or one 240 and two 120s.
answered 2 hours ago
DoxyLover
2,7941715
Thank you! I'm trying to install two new 20A circuits for exterior outlets, and it doesn't look like Siemens makes a quad with 15A double pole inside and 20A single poles outside, so I'll have to find another way to do it.
– jbiscuit
2 hours ago
add a comment |Â
up vote
1
down vote
accepted
up vote
1
down vote
accepted
NO. Your current configuration puts each hot on a different leg, resulting in 240 volts (120+120). The tandem breaker you’re proposing puts both hots on the same 120 volt leg. This will result in zero volts across the hots. If this were a multi-wire branch circuit, you’d end up with double current on the neutral.
What you could use is a compatible quad breaker (4 breakers in the space for two) with appropriate handle ties to produce two 240 volt circuits or one 240 and two 120s.
answered 2 hours ago
DoxyLover
2,7941715
NO. Your current configuration puts each hot on a different leg, resulting in 240 volts (120+120). The tandem breaker you’re proposing puts both hots on the same 120 volt leg. This will result in zero volts across the hots. If this were a multi-wire branch circuit, you’d end up with double current on the neutral.
What you could use is a compatible quad breaker (4 breakers in the space for two) with appropriate handle ties to produce two 240 volt circuits or one 240 and two 120s.
answered 2 hours ago
DoxyLover
2,7941715
edited 2 hours ago
answered 2 hours ago
DoxyLover
2,7941715
answered 2 hours ago
DoxyLover
2,7941715
answered 2 hours ago
DoxyLover
2,7941715
2,7941715
Thank you! I'm trying to install two new 20A circuits for exterior outlets, and it doesn't look like Siemens makes a quad with 15A double pole inside and 20A single poles outside, so I'll have to find another way to do it.
– jbiscuit
2 hours ago
add a comment |Â
Thank you! I'm trying to install two new 20A circuits for exterior outlets, and it doesn't look like Siemens makes a quad with 15A double pole inside and 20A single poles outside, so I'll have to find another way to do it.
– jbiscuit
2 hours ago
Thank you! I'm trying to install two new 20A circuits for exterior outlets, and it doesn't look like Siemens makes a quad with 15A double pole inside and 20A single poles outside, so I'll have to find another way to do it.
– jbiscuit
2 hours ago
Thank you! I'm trying to install two new 20A circuits for exterior outlets, and it doesn't look like Siemens makes a quad with 15A double pole inside and 20A single poles outside, so I'll have to find another way to do it.
– jbiscuit
2 hours ago
add a comment |Â
up vote
1
down vote
Handle ties don't provide common trip. Handle ties provide common maintenance shutoff only. Handle-ties are mainly for MWBCs, which do not require common trip.
Internal mechanisms within the breaker cause common trip, and two separate breakers just can't do that thing.
Therefore for a 240V or 120/240 load, you must use a 2-pole breaker or a quadplex.
answered 57 mins ago
Harper
57.4k335116
add a comment |Â
up vote
1
down vote
Handle ties don't provide common trip. Handle ties provide common maintenance shutoff only. Handle-ties are mainly for MWBCs, which do not require common trip.
Internal mechanisms within the breaker cause common trip, and two separate breakers just can't do that thing.
Therefore for a 240V or 120/240 load, you must use a 2-pole breaker or a quadplex.
answered 57 mins ago
Harper
57.4k335116
add a comment |Â
up vote
1
down vote
up vote
1
down vote
Handle ties don't provide common trip. Handle ties provide common maintenance shutoff only. Handle-ties are mainly for MWBCs, which do not require common trip.
Internal mechanisms within the breaker cause common trip, and two separate breakers just can't do that thing.
Therefore for a 240V or 120/240 load, you must use a 2-pole breaker or a quadplex.
answered 57 mins ago
Harper
57.4k335116
Handle ties don't provide common trip. Handle ties provide common maintenance shutoff only. Handle-ties are mainly for MWBCs, which do not require common trip.
Internal mechanisms within the breaker cause common trip, and two separate breakers just can't do that thing.
Therefore for a 240V or 120/240 load, you must use a 2-pole breaker or a quadplex.
answered 57 mins ago
Harper
57.4k335116
answered 57 mins ago
Harper
57.4k335116
answered 57 mins ago
Harper
57.4k335116
answered 57 mins ago
Harper
57.4k335116
57.4k335116
add a comment |Â
add a comment |Â
jbiscuit is a new contributor. Be nice, and check out our Code of Conduct.
jbiscuit is a new contributor. Be nice, and check out our Code of Conduct.
jbiscuit is a new contributor. Be nice, and check out our Code of Conduct.
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Handle ties don't provide common trip. Handle ties provide common maintenance shutoff only. Internal mechanisms within the breaker cause common trip. Therefore for a 240V or 120/240 load, you must use a 2-pole breaker or a quadplex. Handle-ties are for MWBC.
– Harper
1 hour ago