Blue Sea Systems PN9010 User Manual

]

 

 

Connect the shore power cable to the shore power source.  Turn 

on the shore source to make power available to the boat.

a.  Turn the selector switch to 

SHORE. No Reverse 

Polarity lights should be lit, and power available should 

be indicated. If any red Reverse Polarity lights are on, 

turn off the shore power circuit breaker and disconnect 

the shore cord at the shore source.  Either the hot and 

neutral or hot and ground wires have been reversed.  

Starting at the distribution panel, trace the connections 

as far back as necessary to locate the error.

b.  If there are no indications of reverse polarity, check to 

see that power is available.  If the electrical distribution 

panel has a meter, verify that shore power is available 

and at the proper voltage.   If there is no meter, turn 

on the load circuit breaker for an AC circuit powering 

a convenience outlet and use a voltmeter to verify 

that power is available from line to neutral at the plug.  

Verify that there is no voltage between ground and 

neutral.

]

 

 

Turn the circuit breaker at the shore source to 

OFF.  Set the 

selector switch to 

OFF.  The shore power available lights should 

all be off.  Start the generator and turn the generator breaker to 

ON.

a.  If there are power available lights for the generator 

output, they should light.

b.  There should be no power available indication at the 

shore power circuit breaker.

c.  Set the selector switch to 

GENERATOR.  Power 

should be available at the power distribution panel.  If 

the electrical distribution panel has a meter, verify that 

power is available and at the proper voltage.

d.  There should be no power available lights indicating at 

the shore circuit breaker.

]

  Test the third source in a similar manner. 

Alternating Current (AC) power changes polarity 60 times per second in the 

US, Canada and Latin America and 50 times per second in Europe. This is 

the frequency of the power and is referred to as Hertz (or the now outdated 

term “cycle”). Because of this alternating nature of AC power, two live 

sources of AC power, such as shore power and inverter power, or shore 

power and a generator, cannot be electrically connected. The AC Source 

Selector switch is designed to connect two sources of AC power to a 

common circuit while preventing both sources from being connected to the 

circuit simultaneously.

  • Calder, Nigel (2005). Boatowner’s Mechanical and Electrical Manual 

    (3d ed). Camden, ME: International Marine / McGraw-Hill.

  • Wing, Charlie (2006). Boatowner’s Illustrated Electrical Handbook 

      (2d ed). Camden, ME: International Marine / McGraw-Hill.

    • 360 Panel System

    • Battery management solutions

    • AC and DC circuit protection devices

    • WeatherDeck™ waterproof panels

    • BusBars, fuses, and fuse blocks 

    • Analog and digital meters

It is possible to verify most connections using an ohmmeter before 

power is applied.  These procedures take a little time, but are 

recommended, especially if some elements of a previous installation 

might not have been clearly or correctly labeled or follow the expected 

color codes.

There are many possible sources that may be selected using this 

switch, and they may be arranged in any order.  The following test 

instructions are generally suitable for shore and generator installations.  

The third source may be another shore power inlet

or an inverter or other specialized source. 

]

 

 

Disconnect the shore power cord from the shore power source 

and bring the shore plug aboard to a point close to the switch 

panel.  Connect the other end of the shore cord to the boat’s 

power inlet.  Turn ON the shore power circuit breaker between the 

inlet and the selector switch.  Set the selector switch to OFF.

a.  Use an ohmmeter to check for continuity from the shore 

ground plug to the green wire at the electrical panel.  

b.  Check for continuity from the power cord plug neutral 

pin to the neutral wire (white typically in US, light blue 

typically in Europe) at the selector switch.

c.   Check for continuity between the line pin of the shore 

plug and the line wire (typically black in US, brown in 

Europe) at the selector switch.

d.  Check that there is a high resistance between (>1000 

Ohms) the neutral conductor and the grounding 

conductor.

e.  Verify that there is a high resistance between (>1000 

Ohms) between the shore cord plug neutral pin and 

line pin.  There may be indicator lamps in the circuit, 

but no more than that with the selector switch in the off 

position.

]

 

 

With the shore cord still disconnected from the shore and 

available onboard, and the generator set not operating, set the 

load circuit breakers to off, so there is no load at the output side of 

the selector switch.

a.  Verify that the there is a high resistance between the 

line and neutral of the load side terminals of the 

selector switch.  There may be indicator lamps still 

attached, so it may not read open circuit.

b.  Set the selector switch to SHORE.  The ohmmeter 

should still indicate a high resistance.

c.  Short the line pin to the neutral pin of the shore cord 

and verify that the line and neutral at the load side of 

the selector show a low resistance when these are 

shorted and a high resistance when they are not.

]

 

 

Turn the generator circuit breaker to OFF and set the selector 

switch to the generator position.  All load circuit breakers should 

still be off.  Leave the shore input circuit breaker in the on 

position.

a.  Verify that there is a high resistance (>1000 Ohms) 

from the line to neutral.

b.  Verify that there is a low resistance from the neutral to 

ground at the load connections.

c.  With the generator still not running, close the generator 

circuit breaker at the generator.  Verify that there is a 

now a low resistance from line to neutral where the 

generator windings are now connected across the 

circuit.

d.  Verify that there is still a high resistance from neutral to 

ground and neutral to line at the shore power plug.

]

  Test the third source in a similar manner. 

]

  Set the Selector switch to 

OFF, turn the shore power breaker 

to 

OFF, and leave the load panel circuit breakers in the OFF 

position.  Complete the mounting of the switch.  

]

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