Electrical System

The home and grounds are serviced by a 200 Ampere 110 / 220 Volts electric supply provided by Central Maine Power or by a 100 Ampere 110 / 220 Volts Standby Generator

Power Supply Description:

The CMP 200 AMP Service via the Smart Meter and external Master Panel or the 100 Amp supply from the Standby Kohler Generator enter the home at Master Panel #1 and Master Panel #2 in the garage. These two panels are tied together with 200 AMP Jumper cables to provide a total of 60 Primary Circuit Breakers (30 in each panel) to manage the Electrical Load.

The load is split further into 4 Sub-Panels from primary breakers on Master Panels #1 & #2 as diagramed below. These Sub-Panels provide more Circuits to manage the load and put the control breakers close the circuits they manage. For example, the Kitchen Lights and Power are mostly managed at the 40 AMP Sub-Panel #3 in the Kitchen Pantry.

This design adds more control and circuits for more discrete distribution of the load without bundling multiple circuits on a single breaker. It does also mean that you need to know how the load is dispersed from the two Master Panels in the garage to primary circuits and through the 4 Sub-Panels to secondary breakers in each Sub-Panel. See the Panel Diagram.

A dangerous short circuit is protected by the Master Panel that supplies the power and the Sub-Panel if the circuit is on one of the 4 Sub-Panels. In that case more than one breaker may need to be reset after the issue is resolved.

With over 100 circuit breakers the load is very discreetly delivered and there has never been a “tripped breaker” due to overload since the system was installed.

Because of the complexity of the Electric Power Distribution System this information is provided for you or your electrician if you need to isolate a circuit for modification or maintenance. For example, to empty the Hot Tub you must shut down the Tub in its Disconnect Panel or at its supply in the Sub-Panel #4.

External Electric and Communication Panels

200 Ampere Exterior Isolation Panel and Standby Generator Bypass Switch

The 200 Ampere Exterior Electric Isolation Panel is a system safety shutoff for interrupting power from the CMP Meter Supply Panel.

The Standby Generator Bypass Switch is activated when power is lost from the CMP Meter Supply Panel. The activated Bypass Switch isolates the CMP Meter Supply Panel from generator power blocking dangerous electrical back feed to the community wide Power Grid. The activated Bypass Switch starts the Standby Generator within five (5) seconds after loss of power from the Grid.

Note: if the Standby Generator is not “taken offline” (turned off) when the 200 Ampere Breaker is shut off the Generator Bypass Switch will engage, and the Standby Generator will start supplying power to the entire home electrical system through the Dual Master Panels #1 and #2.

To totally isolate the entire system from both power sources, turn off the Standby Generator and shut off the 100 Amp breaker on the generator and then turn off the 200 Ampere Breaker in the Exterior Electric Isolation Panel.

Simplified Power Supply Panel Diagram

Exterior Panels
Generator Switch	200 Amp Emergency Service Isolation Breaker		CMP ç Smart Meter
↓	↓
Main Panel #1 200 Amp Master Panel #1 100 Amp Breaker # 27+28 ↓	Interior Panels ç200 Amp Jumper è		Main Panel #2 200 Amp Master Panel #2 100 Amp Breaker # 5+7 ↓
100 Amp Sub-Panel #4 On the Deck 60 Amp Breaker ↓		100 Amp Sub-Panel #1 In the Garage 30 Amp 40 Amp Breaker # 1+3 Breaker # 17+19 ↓ ↓
Hot Tub Disconnect Panel 20- & 30-Amp Breakers to Tub		30 Amp Sub-Panel #2 In the Work Bay		40 Amp Sub-Panel #3 In Kitchen Pantry

100 Ampere 220 Volt Standby Generator

A grey box on a rock

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Generator Specifications Sheet

A white power generator with black text

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Standby Generator Contact Information

Kohler Power Website (National site)

Mid-Maine Generator (Installation Dealer)

207-395-8066

1388 Route 202 Winthrop, ME 04364 4.55 mi.

Email | Website | Directions

Link to Generator Operation Manual

200 Ampere Dual Main Circuit Panels #1 & #2 in the Garage

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These two master panels are connected in tandem with 200 Amp ‘Jumper Cables” and essentially operate as a single Master Power Station. All primary circuits and Sub-Panels and their circuits can be isolated from these two panels. Each of these panels have a 200 Amp Master Circuit Breaker.

Master Panel #1 in Garage

Master Panel – 1

200 Ampere 110/220 Volts

1	15A	Southeast Bedrooms South wall power except outlet under window by bathroom	2	20A	Southeast Bedroom, West wall outlet
3	15A	Southeast Bedroom North wall power Northeast Bedroom South Closet Wall power	4	15A	Southeast Bedroom Fan and Light unit.
5	20A	Dishwasher	6	20A	Southeast Bedroom South wall power under window for AC
7	15A	North Porch Lights and Power + Power at Fireplace Great Room South Wall power, Router Station in Loft	8	15A	Light over range top and outside deck light and outside power by kitchen door
9	15A	Available Not Used	10 ---- 12	50A	Range Top Fan and Convection Oven
11	20A	2^nd Floor Toilet Room Light and Fan Unit + GF outlet @ bathroom sink	10 ---- 12	50A	Range Top Fan and Convection Oven
13	20A	2^nd Floor Bathroom Light Heat and Fan Unit + Lights over sink	14	15A	Ground Floor Great Room Closet Lights
15	20A	Garage Door Openers, Garage South Wall, and Small Shed Power	16	15A	Northeast Master Bedroom Lights
17	15A	Kitchen Light at top of stairs, Kitchen fan-light units, Kitchen East wall power, Attic Lights	18	15A	Sewer Pump Alarm
19	20A	Kitchen Counter Power above the Compactor	20	15A	Smoke / Fire Alarms
21	15A	Attic Cold Storage Space lights	22	20A	2^nd Floor Lakeside Porch Power Outlets
23	20A	Dining Room and North-East Master Bedroom North Wall Power Outlets	24	20A	2^nd Floor Hall & South Wall Dinning Rm Power Outlets
25	20A	Northeast Power Outlets	26	15A	Mid-Room Power Feed
27 --- 29	100A	Sub-Panel #4 on Deck at Hot Tub	28	15A	3 Fans 2^nd level Porch and Dinning Room
27 --- 29	100A	Sub-Panel #4 on Deck at Hot Tub	30	15A	Doorbells

Master Panel #2 in Garage

Master Panel – 2

200 Ampere 110/220 Volts

20A

Garage Backwall Power

20A

TV Station Power Outlet

20A

Central Vacuum

20A

Boiler Room and Ground Floor East Room Power Outlets

100A

Sub Panel – 1

20A

Kitchen Counter Power Outlet above Compactor

100A

Sub Panel – 1

20A

Kitchen Power Outlet at Top of Stairs)

15A

Available Spare

15A

Garage Lights

15A

Ground Level Lakeside Porch Lights

20A

Ground Floor Bathroom Vanity Light & Power, Fan / Heat / Light

20A

Refrigerator, power-strip under cupboard + outlet next to refrigerator

20A

Washer Power Outlet

40A

Welder Station

20A

Computer Station Power Outlet, East Room East wall power outlets

40A

15A

Ground Floor Great Room Ceiling and Hearth Lights

15A

Boiler and Boiler Room Light

15A

Ground Floor Way Finding and North-East Ceiling Light

40A

Clothes Dryer

20A

Fresh Water

Well Pump

40A

Clothes Dryer

20A

Sewer Pump & Bar Sink Power Outlet

20A

Ground Floor Grate Room North Wall Power Outlets

15A

Ground Level Lakeside Porch Power Outlets

(Feed Line)

20A

Ground Level Lakeside Porch Power Outlet (Feed Line)

20A

Ground Floor Great Room South Wall Power Outlets

15A

Woodshed, Lamp Post, Flood Light, Side Entryway Light

	Description 100 Amp Sub-Panel #1 in Garage on Circuit Breaker # 5+7 of 200 Amp Master Panel #2
This 100 Amp Sub-Panel #1 is powered by the Master Panel #2 and feeds power to its circuits and to the circuits on the 30 Amp Sub-Pane #2 in the Work / Storage Bay and the 40 Amp Sub-Panel #3 in the Kitchen Pantry.

Braker List for the 100 Amp Sub-Panel #1 in Garage with power from Circuit Breaker # 5+7 on 200 Amp Master Panel #2

100 Amp Subpanel #1 Brakers
1	30A	220 V feed to Sub-Panel – 2 Storage Bay	2	20A	2^nd Floor Porch Heat
3	30A	220 V feed to Sub-Panel – 2 Storage Bay	4	20A	2^nd Floor Porch Heat
5	20A	220 V to 1^st Floor Porch Heat, West Side	6	20A	220 V to 1^st Floor Porch East Side Heat
7	20A	220 V to 1^st Floor Porch Heat, West Side	8	20A	220 V to 1^st Floor Porch East Side Heat
9	20A	2^nd Floor Master Bedroom Power	10	20A	220 V to Lake Water Pump (See Notes 1, 2 & 3 below)
11	30A	30 Amp 110 Volts to Camp Site #1 – Camper Power at utility post with 30 Amp Covered Receptacle	12	20A	220 V to Lake Water Pump
13	20A	Power at post at the Well and Power at post at the RV Pad	14	15A	2^nd Floor Porch Lights
15	40A	Sub Panel #3 in Kitchen Pantry	16	15A	Well Post lights at landing
17	40A	Sub Panel #3 in Kitchen Pantry	18	15A	Garage forward lights & overhead storage lights
19	20A	Spare	20	20A	?
21	20A	Power at The Parking Area Utility Post under tree + Large Shed	22	15A	?
23		Blank	24	20A	GFI Spare
Δ <= Sub-Panel #1 Notes: Notes 1 -3 apply to Braker #10 - #12 that supplies the 220 V / 20 Amp line to the Lake Water Pump Receptacle at the utility post at the boat dock. Note 1) This line from Sub-Panel #1 travels above all the lower-level South side closets and is joined to the circuit that activates the pressure switch on the Lake Water Expansion Tank at the back of the Storage Bay. The lines are spliced in a covered junction box in the back of the West Side Storage Bay across from the Expansion Tank. Note 2) The line from the pressure switch on the Lake Water Expansion Tank to the Lake Water Pump Receptacle at the utility post at the boat dock placement passes through Sub-Panel #2 where it is spliced to the line out to the pump. There is no connection between this line with any circuit in Sub-Panel #2. The line is spliced and simply passes through using Sub-Panel #2 as a junction box. Note 3) The spliced line behind the cover of Sub-Panel #2 is labeled.

30 Amp Sub-Panel #2 in the Utility Bay

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Δ Labels for the Breaker Panel in the Utility Bay

Breaker list for the 30 Ampere Sub-Panel #2 in Work Bay on Circuit Breaker # 1+3 of 100 Amp Sub-Panel #1

#1	20A	220 Volt Receptacle Below This Panel
#2	20A	220 Volt Receptacle Below This Panel
#3A	20A	Power
#3B	20A	Gas Fireplace Inserts
#4A	20A	Back Room Power
#4B	20A	Back Room Power
#5A	15A	Lights
#5B	15A	Exhaust Fan
#6A	20A	Power
#6B	20A	110 V Dock Power @ that Post

40 Ampere Sub-Panel #3 in Kitchen Pantry

Breaker List for: Kitchen Pantry 40 Amp Sub-Panel #3

See note on breaker 6B below

Kitchen Pantry 40 Amp Sub-Panel #3 On Breaker # 17+19 Of 100 Amp Sub-Panel #1
OFF			ON	ON				OFF
#	AMP	USE			#	AMP	USE
1	20	Central Air Conditioner Heat Pump			2A	15	Phone and Pantry Light
					2B	15	Track Light over Kitchen Sink
3	20	Double Gang 220 V Breaker			4A	20	Kitchen West Wall Power Outlets
					4B	15	Kitchen Light over Stairs
5A	15	AC Power Vent Control			6A	20	Compactor & Power @ End Cabs
5B	15	Hall Light			6B	15	(not yet utilized) See Note on 6B
7A	20	Microwave Oven			8A	20	Dishwasher
7B	20	Available for Use			8B		Blank – No Breaker

Note on Breaker 6B: This breaker is wired through the single switch set in the tiled backsplash to the left of the kitchen door. The line ends in the cabinet behind the trash compactor and is safely capped. Note that the breaker is off. This line and switch were set up to energize lights on the covered deck.

The line was to be accesses through the outside wall but was never used as the 100 Amp panel on the deck was used for the lighting intended for the line on breaker 6B.

The Dead Kitchen Switch on Breaker 6B

Note on Breaker 6B above: refers to this dead (non-functioning) switch which supplies energy through Breaker 6B to a cable behind the Trash Compactor to be accessed through the exterior wall to supply supplemental lighting to the covered deck outside of the Kitchen Door.

100 Ampere Sub-Panel #4 on the Deck under the Canopy

100 Amp Sub-Panel #4 on Deck under the Canopy Supply from Master Panel #1 on Circuit-Breaker 27/29
1		Blank
2	60 A	220-Volt GFI Protected supply line to the Hot Tub Disconnect Panel
3	60 A
4		Blank
5		Blank
6	15 A	Available for outside lighting
7	20 A	Available for outside power
8		Blank

100 Ampere Sub-Panel #4 on the Deck under the Canopy

Hot Tub Disconnect on the Deck on 50 Amp Circuit Barker # of 100 Amp Sub-Panel #4

Hot Tub Disconnect Panel on Deck under the Canopy Supply is from 100 Amp Sub-Panel #4 on the 50 Amp Circuit-Breaker # 2 & 3
1		Blank
2		Blank
3	30 A	GFI protected 220-V supply to the Hot Tub Heater
4
5	20 A	GFI protected 220 V supply line to Hot Tub Pumps
6

Hot Tub Disconnect on the Deck on 50 Amp Circuit Barker # of 100 Amp Sub-Panel #4

The Hot Tub Disconnect Panel is powered by the 60 Amp Breaker on the 100 Amp Sub-Panel #4 and provides power to the Hot Tub Heater via its 20 Amp 250 Volt GFI Breaker and to the Hot Tub Pumps via it 30 Amp 250ilter Volt GFI Breaker.

References:

The State of Maine had adopted the 2020 National Electric Code (NEC) for all new construction.

Page File Location:

G:\MRL\119MRD_WS\Systems\Electrical_System\Electrical_System.htm

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