60 amp 240 v breaker in 100 amp sub panel

[Jimthomsen]

Hello,

My sub panel is 100 amp (from a main of 200 amp) and it currently has a 20 amp 240 v breaker for A/C and then only lights and outlets. This is not a house, just a remote building with toilets, shower and outside kitchen.

I want to add an instant on tankless water heater that requires a 60 a 240v breaker. But it will not accept it because of the tab that stops the breaker from being completely inserted. 50 a and below work fine.

It’s a fairly new sub panel, so that may explain the tabs? Maybe related to CTL?

I’m just a DIY guy, but have done lots of home wiring including adding sub panels.

How can I solve this? Do I need to replace the sub panel?

Thanks for your help!

Jim

 

[Megawatt]

Hello,

My sub panel is 100 amp (from a main of 200 amp) and it currently has a 20 amp 240 v breaker for A/C and then only lights and outlets. This is not a house, just a remote building with toilets, shower and outside kitchen.

I want to add an instant on tankless water heater that requires a 60 a 240v breaker. But it will not accept it because of the tab that stops the breaker from being completely inserted. 50 a and below work fine.

It’s a fairly new sub panel, so that may explain the tabs? Maybe related to CTL?

I’m just a DIY guy, but have done lots of home wiring including adding sub panels.

How can I solve this? Do I need to replace the sub panel?

Thanks for your help!

Jim

The best I can tell you is install a good name brand panel with enough circuits to accommodate a 60 amp breaker.

 

[pc1966]

It’s a fairly new sub panel, so that may explain the tabs? Maybe related to CTL?

Can you post more details (panel make / model, etc) and also a photograph or two showing the problem?

I suspect you are looking at what @Megawatt said - a panel designed to cope with a 60A load from one breaker.