| Standardization field | Electrical engineering
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| Technical committee | BAS/TC 52- Controlgear and switchgear installation |
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| Term (EN) | busbar trunking fire barrier unit - fire barrier BTU |
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| Definition (EN) | BTU or a part of, intended to prevent the propagation of fire through building divisions for a specified time under fire conditions |
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| Term (FR) | |
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| Definition (FR) | |
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| Term (DE) | |
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| Definition (DE) | |
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| Term (BS) | protivpožarna jedinica sabirničkog kanala - protivpožarni BTU |
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| Definition (BS) | BTU ili dio, namijenjen za sprečavanje širenja požara kroz pregrade zgrade određeno vrijeme u uvjetima požara |
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| Term (HR) | |
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| Definition (HR) | |
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| Term (SR) | |
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| Definition (SR) | |
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| Date | 2025-01-16 |
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| Standards | BAS EN 61439-6:2025 |
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