False. Reverse polarity is defined as reversed connection of which circuits? Who's right? T or F: if no standard rating OC protection device is available which equals 100% of the allowable current for the conductor being protected, the next larger rating, up to 150% of the conductor ampacity, may bee used - unless the load is a motor. Under which condition may a genset with non ignition protected components be installed in a compartment containing a gasoline propulsion engine? For proper inverter operation it is important to do all of the following except. 1500 Watts / 20 A circuit (E-11.8.2.2.1.2). Thermal protection device recommended in motors! What is the minimum insulation temperature rating for conductors routed inside an engine room? These marks are seen commonly on appliances and computer equipment, furnaces and heaters, fuses, electrical panel boards, smoke and carbon monoxide alarms, fire extinguishers and sprinkler systems, personal flotation devices, bullet resistant glass, and thousands of other products. What ampacity is required for wire and terminals connecting a galvanic islolator? (A-28.11.1). Make sure the field wire has appropriate voltage when engine is running. Qualification BMEEA-certified Marine Electrical Technician, an industry recognised qualification. T or F: CO detectors will also detect smoke in most situations. Which is not a correct mode of operation of an inverter? False, they must be isolated to prevent shock hazard at the unutilizd shore power connector pins. 600 Watts for 15-amp circuit, 1000 Watts for 20-amp circuit (E-11.13.3.4). T or F: it is ok to install batteries directly below an uninterrupted fuel line? Which technician is correct? When simultaneously recharging two different types of batteries (house & start) with diode type battery isolator, where is it best to sense the voltage for charging source? Which ABYC standard refers to the fuse in the DC positive conductor for inverter/battery charger output protection? The BMEEA was formerly known as the British Marine Electronics Association (BMEA) until October 2013. Using the ABYC voltage drop table, what size wire is needed? Training course and a qualification. DC grounded conductors on new boats that are also equipped with AC systems should use what color of insulation? It also involves systems that make the vessels usable for crew, passengers and cargo. Which is NOT a correct statement regarding the automatic shut-down device for a permanently installed Genset? Closed when in neutral (therefore, an open-circuit failure would prevent engine starting). Technician B says it is allowable to go up to 150% over the current allowed in table VI A-C of E-11. Start-in-gear protection switches should be open or closed when in neutral? On a brushless generator, a possible cause for low AC voltage output under load could be: Tech A says the ABYC has pull-test requirement for wiring connecting the generator to onboard circuits. 8 AWG (using E-11 Table IX, 3% voltage drop, 40' total distance, 10 Amps). Technician A says generator output loads should be balanced between legs. Voltage drop could be used to test for a bad starter cable. Which tech is correct? True or False: AC receptacles may be used for DC service, provided they are properly labeled. Technician B says that they must be kept separate. T or F: It is ok to combine different types of batteries as long as they are all of the lead-acid type (i.e. The total impedance of polarity indicating and protection devices connected between normal current carrying conductors and the grounding conductor (green wire) shall be: T or F: An acceptable way to check for loss of ground in an AC circuit is to plug a light bulb into a receptacle's hot and ground. Define: Battery reserve capacity = the number of minutes that a new, fully charged battery at ______ degrees F can be continuously discharged at ______ amps while maintaining _____ volts (for a 12 v battery). What is the general rule for use of friction connectors? What is the minimal required surface area for lightning protection system's immersed ground plate? Most engine-driven alternators are optimally spun at what percentage of engine RPMs? Tool of choice for determining an inverters level of EMI is the: A 2000 watt inverter is operating inverting at 100% effeciency. As the motor heats up, winding resistance increases causing a corresponding decrease in current draw. Define: Marine Cranking Amps = the discharge load, in amperes, that a new, fully-charged battery at _____ degrees F can deliver for ______ seconds while maintaining a voltage of _____ volts (for a 12 v battery). An open circuit in the neutral to ground link at an AC generator. When using a high-resolution amp clamp on a shore power cord and activating AC circuits one by one, the technician notes that the AC leakage current measured increases with each appliance. You have a cable that runs from a battery to a bow thruster. What does this number represent? The maximum allowable voltage drop permitted for panel board DC feeders is: T or F: Solid (non-stranded) conductors are not allowed for AC wiring anywhere on a boat. T or F: metal AC panel boards must be grounded. A sine wave for "Shore Power" AC has an RMS value of 120 volts. An isolation transformer shall have overcurrent protection rated at not more than _____ of the rated primary of the transformer. Technician B says that backfeeding is caused by DC reversed polarity. When more than one shore power inlet is installed, ABYC recommends that the neutrals are, For a single shore power installation with multiple inlets, all current carrying conductors shall be. All of the following could cause a conductor to overheat except. Which is correct? This most likely indicates: A system voltmeter shall be installed on the main panel board if the system is permanently connected to: Two techs are rewiring an old sailboat. Which of the foillowing is the most probably cause? KDM Marine Electrical Enclosures also adhere to the NEM 4 and 4X requirements, making them a perfect choice for most marine applications. How far away from a gasoline tank must a pre-wired battery charger's AC connection plug be located? 613 Third Street, Suite 10 - Annapolis, MD 21403 - Phone: 410.990.4460 - Fax: 410.990.4466 Electrical Training And Inspections For Surveyors This one-day training program is designed by a surveyor, for surveyors, to assist in evaluating a boatâs electrical system during the course of a marine survey. What is a possible problem with installing a new solid state Voltage regulator to replace a manual one? If a generator set is equipped with a sound shield, the shield shall. After installing an alternator, a technician should: When installing a wind generator, the technician must consider all of the following except: When testing an alternator, the maximum AC ripple reading to ensure minimal RFI interference should be: You have a customer with an 800 Ah 'house' battery bank who wants to recharge with the biggest amount of amperage he can. 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