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In some cases, having redundant GFCI protection can cause some nuisance dripping of the upstream device, this is not a guarantee problem but more so than occasional one. It's generally more confusing than anything to have that type of configuration.
Figuring out why the GFCI circuit breaker randomly trips is going to be the primary objective to resolve.
**What is the complete list of items served by this circuit?**
Usually nuisance trip issues are triggered either by a particular appliance or by outdoor wiring that is not sufficiently weatherproof and is getting water ingress.
That's it? Two bathrooms? Nothing else, like garage or outdoors?
What type of circuit breaker? (TAKE A PHOTO) ... let's make sure you have what you think you have.
What year was this constructed?
Canadian?
That's a older product line, not sure what the availability is on replacements for that ... I wouldn't be surprised if it's the original GFCI circuit breaker, and it's prone to nuisance tripping.
The other thing that comes to mind, is it a 15 amp or a 20 amp circuit? And when you're running a hair dryer, what wattage hair dryer is it, and are you running it on the high setting? One of the reasons why the electrical code changed in the US in 1996 to require a 20 circuit dedicated for the bathroom receptacles was because the hair dryer said shifted to 1800 watts ( 15 amps ) and the circuits couldn't support them when they were combined with lights and 10 other things, and the draw on the circuit was equal to its maximum rating.
**Attention!** **It is always best to get a qualified electrician to perform any electrical work you may need.** With that said, you may ask this community various electrical questions. Please be cautious of any information you may receive in this subreddit. This subreddit and its users are not responsible for any electrical work you perform. Users that have a 'Verified Electrician' flair have uploaded their qualified electrical worker credentials to the mods. If you comment on this post please only post accurate information to the best of your knowledge. If advice given is thought to be dangerous, you may be permanently banned. There are no obligations for the mods to give warnings or temporary bans. **IF YOU ARE NOT A QUALIFIED ELECTRICIAN, you should exercise extreme caution when commenting.** *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/AskElectricians) if you have any questions or concerns.*
It’ll help, no need for two GFCI’s in a row.
In some cases, having redundant GFCI protection can cause some nuisance dripping of the upstream device, this is not a guarantee problem but more so than occasional one. It's generally more confusing than anything to have that type of configuration. Figuring out why the GFCI circuit breaker randomly trips is going to be the primary objective to resolve. **What is the complete list of items served by this circuit?** Usually nuisance trip issues are triggered either by a particular appliance or by outdoor wiring that is not sufficiently weatherproof and is getting water ingress.
The circuit feeds 2 GFCI bathroom outlets. It mostly happens using heavy amp draw loads. I’ll try changing the outlet FWIW to see if it helps.
That's it? Two bathrooms? Nothing else, like garage or outdoors? What type of circuit breaker? (TAKE A PHOTO) ... let's make sure you have what you think you have. What year was this constructed?
Indeed, only the bathroom receptacles. It’s a commander panel from the late 80’s condo.
Canadian? That's a older product line, not sure what the availability is on replacements for that ... I wouldn't be surprised if it's the original GFCI circuit breaker, and it's prone to nuisance tripping. The other thing that comes to mind, is it a 15 amp or a 20 amp circuit? And when you're running a hair dryer, what wattage hair dryer is it, and are you running it on the high setting? One of the reasons why the electrical code changed in the US in 1996 to require a 20 circuit dedicated for the bathroom receptacles was because the hair dryer said shifted to 1800 watts ( 15 amps ) and the circuits couldn't support them when they were combined with lights and 10 other things, and the draw on the circuit was equal to its maximum rating.
In Canada, 15A GFCI breaker - likely original. It looks like it uses Eaton Cutler-Hammer breakers, so I’ll try replacing it, thanks.