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Thank you for your response. I intend to connect six (6), 12/24VDC, 40mA (max) door hold-open devices to the 1A power supply. I expect a max. load of 240mA which should be within capacity of the power supply.

Hello, I'm working on an application to install door hold-open devices in a facility which does not have a fire alarm control panel. The facility does have smoke alarms installed. The intention is to remove power to the door hold-open devices during a smoke alarm condition. I'm planning to...

Hello, It seems to be a utility rule. But the CEC Section 64-112 c & 64-112 d, mentions the following: "The sum of the ampere ratings of the OCP in source circuits supplying power to a busbar / conductor shall be permitted to exceed the busbar / conductor ratings to a maximum of 120% of the...

Hello, I'd appreciate some feedback on the following PV system sizing scenario: The main electrical service for the building is 400A, 1-phase, 120/240V. The main CDP is rated for 400A, 1-phase, 120/240V. Based on the 20% power feedback rule, I'd be permitted max. of 80A (19.2 kW PV system)...

Hello, I wanted to inquire if installation of junction box on grade to extend the existing U/g feeders to a generator system, is a good installation practice or not? An exterior generator is planned for relocation. Currently three (3) U/g feeders in conduits are run to the generator. The...

Hello, In one of our projects, an existing fire pump is being conneceted to a new emergency generator. New fire pump controller with Automatic Transfer Switch (ATS) within the same cabinet is also being planned. Due to site conditions, the new fire pump controller with ATS cannot be installed...

Hello, We are installing a generator to back up some building system loads as well as an existing fire pump. The separate fire-pump rated ATS is needed to be installed on a cantruss stand instead of being wall mounted adjacent to the fire pump controller, due to the unavailability of wall...

Thank you very much guys for your insights.

Hello, I'm working on a renovation plan for a corridor area in my house. The building is relatively old (1980s) and during initial scoping, I noticed that there is no ground conductor on the lighting circuits for this area. I wanted to inquire if installing a grounding conductor to the...

Hello, I'm working on an application to connect Carbon Monoxide (CO) alarm in a utility room with the building's fire alarm panel so that the CO alarm could be monitored via an off-site monitoring station. In conventional panels both Kiddie and BRK have CO alarms and relevant relay modules...

Thank you Keith for your response. This is 30 year old building and the residents are seniors. The bells do not seem to provide code required decibel levels in the bedrooms.

Hello, We are considering installation of piezo mini-horns in each apartment unit of a multi-unit residential building. The building has a conventional fire alarm system with bells in the corridors for notification. The addition of piezo mini-horn in each unit is to ensure minimum audibility...

Hello, I have a few application related queries concerning standard, electric baseboards with front heat discharge and linear, convectors with top heat discharge. I understand that the linear convectors are more compact, but are following concerns valid: 1. Linear convectors provide uneven...

I apologize. I'll re-post in appropriate section.

Hello, I have a few application related queries concerning standard, electric baseboards with front heat discharge and linear, convectors with top heat discharge. I understand that the linear convectors are more compact, but are following concerns valid: 1. Linear convectors provide uneven...

Thank you for your insight on this issue.

Hello, We've installed a Chubb Edwards Emergency Alarm System in a 9-unit, seniors, multi-unit, residential building. The building as per code does not require a dedicated fire alarm system, but we wanted to monitor any emergency conditions within the building, so we installed an Emergency...

HRV is a Heat Recovery Ventilator. Almost all HRVs are usually only available in a plug-in version.

Hello, The mechanical engineer has installed the HRV including the supply and exhaust ductwork in a ceiling bulkhead. Access hatch has been provided for maintenance access. For such HRV installed inside the bulkhead, would it be better (code compliant) to install an electrical outlet in the...

Hello, I'm working on a plan to install 4kW, 1-phase, 240VAC, grid-tied, micro-inverter based, Photo-Voltaic System no a rooftop in a multi-unit residential building. I wanted to inquire if it is an acceptable practice to run the AC cables from the rooftop junction box to the PV AC Disconnect...