GTK’S 2 of 2
The separation between communication and power conductors is based on voltage.
In a service installation with a metal pipe coming into the meter base, the jumper from the ground bushing connect to the bonding bus.
To install a metal light post on a concrete footing, install conduit, pour concrete, stand pole then wire fixture.
When wiring a splitter box to a single set of overcurrent devices, the maximum allowable length of reduced tap conductors is 7.5m.
Thermostat no function would be displayed on the wall thermostat if the high limit switch is not making contact.
Open delta on a 3 single phase transformer bank is 87% of the total Kva of the bank.
The extra low voltage cable for an HVAC system is required to be run through plenum is a CIC (Control and Instrumentation Cable).
Where a fire separation is pierced by a raceway or cable, any opening around the raceway or cable shall be properly sealed in compliance with national building code of Canada.
When EMT is installed through a fire wall, we fire stop to complete the insulation.
A transfer switch in a fire pump circuit is downstream from the main supply.
GFCI setting for heat trace is 30 ma.
When a NEMA starter is replaced with an IEC starter, we use Class J or CC type.
The building code of Canada is responsible for maintaining the exit sign or the emergency system while the electrical code (Csa) is responsible for the installation.
A motor starter is considered analog.
Deck boxes require one #6 awg.
In a wireway, 40% fill for communication conductors and 20% fill for power.
Taps and splices in cellular floors shall be made only in header access units or in junction boxes.
Type 12 enclosure is used when installing a VFD in a saw mill.
1 overload per phase. For 120V or 347V, we need one set of contacts. For 240V, we need 2 sets of contacts.
Megger is used to measure the dielectric strength of a cable.
A battery in a security alarm circuit is used to provide constant voltage supply.
Surge protection protects electronics such as VFDs.
SPDT (Single pole double throw) switch protects one circuit.
Start buttons are normally open connected in parallel. Stop buttons are normally closed connected in series.
A dc shunt, dc compound and synchronous motors are constant speed motors.
Wire wool is used to clean a flame sensor.
A pyrometer is used to measure 4000 degrees Celsius.
when selecting a contactor when the amps are given, we need the voltage.
Maximum voltage drop on a remote lamp is 5%.
A #16 awg is used for a thermostat wire.
S2 cable staple is needed for a #14/3 and S4 for an #8/3.
Fluorescent fixtures use 90-degree wire.
Reduced Voltage Starter is the best method to start a DC generator.
There shall be no joints or splices in conductors or cables within raceways, except in the case of cable trays.
Disconnecting means on a portable machine will be on the machine.
Offset clip is used to prevent an electrician from having to bend an offset into a box.
Fuel, ignition source and oxygen are needed to start a fire.
Table 67 is used to find the numbers for heating clearances from section 62.