Why worry, it is not dangerous, and the breaker will almost certainly never trip. It may seem to be an odd design, but perhaps a 40A breaker was not available, and close fusing of this kind is not a problem in principle. Study fig 3A4 carefully, a B32 will carry 37A for at least 10,000 seconds, which is quite a long shower. If it was a fuse it would never blow.
Why worry, it is not dangerous, and the breaker will almost certainly never trip. It may seem to be an odd design, but perhaps a 40A breaker was not available, and close fusing of this kind is not a problem in principle. Study fig 3A4 carefully, a B32 will carry 37A for at least 10,000 seconds, which is quite a long shower. If it was a fuse it would never blow.
