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Important Change. 2006 Manitoba Building Code. 3.2.4.18.(10) & (11) Audibility of Alarm Systems. MBC 3.2.4.18.(10) & (11). Background: The 2006 Manitoba Building Code requires that audible fire alarm devices in suites of residential occupancy be supervised.

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2006 manitoba building code

Important Change

2006Manitoba Building Code

3.2.4.18.(10) & (11)

Audibility of Alarm Systems

mbc 3 2 4 18 10 11
MBC 3.2.4.18.(10) & (11)
  • Background:
    • The 2006 Manitoba Building Code requires that audible fire alarm devices in suites of residential occupancy be supervised.
    • This is a change from the 1998 MBC where Sentence 3.2.4.19.(11) directly stated that the audible devices located within suites of residential occupancy “are not required to have individual electrical supervision.”
    • That statement was deleted in the 2006 MBC and although Article 3.2.4.18. doesn’t specifically state that supervision is required, Item 3.3.1.1 in CAN/ULC-S524, Installation of Fire Alarm Systems, does.
slide3

There are three different methods that may be used to wire in-suite audible signal devices in residential occupancies:

  • Class A wiring (return loop circuit) – 3.2.4.18.(10)(a)

Unit 10

Unit 1

Unit 9

Unit 2

Unit 3

Unit 8

Corridor

Unit 7

Unit 4

Unit 6

Unit 5

piezo

Typical Floor Plan Ten Units Per Floor Condos, Apartments

to FACP

slide4

There are three different methods that may be used to wire in-suite audible signal devices in residential occupancies:

  • Class A wiring (return loop circuit) – 3.2.4.18.(10(a)
  • Each Unit on a separate circuit – 3.2.4.18.(10)(b)

Unit 10

Unit 1

Unit 9

Unit 2

Unit 3

Unit 8

Corridor

Unit 7

Unit 4

Unit 6

Unit 5

piezo

Typical Floor Plan Ten Units Per Floor Condos, Apartments

to FACP

slide5

There are three different methods that may be used to wire in-suite audible signal devices in residential occupancies:

  • Class A wiring (return loop circuit) – 3.2.4.18.(10(a)
  • Each Unit on a separate circuit – 3.2.4.18.(10)(b)
  • Class B wiring c/w isolator modules and E.O.L. resistor in corridor

Unit 10

Unit 1

Unit 9

Unit 2

Corridor

Unit 3

Unit 8

and Class A wiring between isolators & suite devices – 3.2.4.18.(10)(a)

Unit 7

Unit 4

Each audible signal device must be supervised!

Isolation Module

Unit 6

Unit 5

piezo

Typical Floor Plan Ten Units Per Floor Condos, Apartments

to FACP

slide6

There are three different methods that may be used to wire in-suite audible signal devices in residential occupancies:

  • Class A wiring (return loop circuit) – 3.2.4.18.(10(a)
  • Each Unit on a separate circuit – 3.2.4.18.(10)(b)
  • Class B wiring c/w isolator modules and E.O.L. resistor in both the corridor and between isolators & suite devices

Unit 10

Unit 1

UNACCEPTABLE

METHOD

Unit 9

Unit 2

Unit 2

Corridor

Unit 3

Unit 8

Unit 7

Unit 4

UNACCEPTABLE METHOD

Audible signal devices are not supervised!

(was allowed in previous MBC;

is no longer acceptable)

Isolation Module

Unit 6

Unit 5

piezo

Typical Floor Plan Ten Units Per Floor Condos, Apartments

to FACP

slide7

There are three different methods that may be used to wire in-suite audible signal devices in residential occupancies:

Unit 10

Unit 1

1. Class A circuit (return loop circuit) – 3.2.4.18.(10)(a)

Unit 9

Unit 2

Unit 2

2. Each Unit on separate circuit – 3.2.4.18.(10)(b)

3. Class B circuit c/w isolator modules & E.O.L. resistor – 3.2.4.18.(10)(a); shown with Class A wiring between isolators & suite devices. Each audible signal device must be supervised!

Unit 3

Unit 8

Corridor

Unit 7

Unit 4

The corridor audible circuit must be separate from other floors and from the dwelling units as per MBC Clauses 3.2.4.18.(11)(a) & (b). The circuit can be wired as Class A or B.

Audible

device

Unit 6

Unit 5

piezo

Typical Floor Plan Ten Units Per Floor Condos, Apartments

to FACP