Muktzeh Machmat Isur

One category of muktzeh is one in which an item is muktzeh during Ben HaShemashot and remains that way all of Shabbat. Items which remain muktzeh because of a status they had during Ben HaShemashot are called Muktzeh Machmat Isur.

Lit Candles

1. An oil candle that was lit before Shabbat going into Shabbat is muktzeh all of Shabbat even after it goes out.
2. Why is a flame muktzeh? Shaarei Muktzeh siman 17 p. 129
   1. Rav Moshe Feinstein (Dibrot Moshe 2:38 and Igrot Moshe OC 3:50) proposes that a flame isn’t a kli since it wasn't human fashioned.
   2. Rav Asher Weiss (Minchat Asher, Shabbat siman 50) answers that it isn't a kli since it isn't made to be used for movement, it is used only to light up the room.
   3. Chazon Ish 41:16 explains that you designate a place for it so it is muktzeh machmat chisaron kis. Encyclopedia Talmudit (v. 42 "Muktzeh Machmat Chesron Kis" fnt. 6) quotes this Chazon Ish but notes that it requires clarification how the flame is considered to have a designated place.
   4. Chazon Ish and Rav Shlomo Zalman Auerbach (Minchat Shlomo 1:14) says that it is nolad since it regenerates each moment.
   5. Peni Yehoshua (45a s.v. kein) explains that it is used for kibuy. He supports it from Rashi (44a s.v. Chutz). It is also implied in Rashi (Chullin 15a s.v. hadolek) out of a concern for kibuy. This approach is also implied by Ritva (47a s.v. amar) who says that it is muktzeh machmat isur because it is forbidden to touch the actual flame!