Bosch HMC87152UC Installation Instructions | Page 8

Bosch Ovens Installation Instructions - HMC87152UC.
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8

Electrical Installation - GROUNDING INSTRUCTIONS

The models stated on the front cover are either dual-

rated, designed to be connected to either 208/240V AC, 

60 Hz, 4-wire, single-phase power supply, or rated at 

120V AC, 60 Hz and use a NEMA 5-20 plug to connect 

to a dedicated 120 V microwave circuit.
208/240 V models may also be combined with some 

Bosch Built-in Ovens and can be connected directly to 

the combo appliance. To do this, please refer to detailed 

instructions with the Bosch Combination Kit.

9

WARNING

When connected to a 4 or 5-wire, 120/208-Volt 3-

phase power supply, the phase C conductor is not 

required for the operation of the appliance.

Electrical Connection with Plug
HMC80152UC
HMC87152UC
Electrical Requirements:

a three prong grounded outlet

120 V, 60 Hz, AC only

20 Amp electrical supply with a fuse or a circuit 

breaker

This product must be connected to a supply circuit of the 

proper voltage and frequency. Wire size must conform to 

the requirements of the National Electric Code or the 

prevailing local code for this rating. The power supply 

cord and plug should be brought to a separate 20-amp 

branch circuit single grounded outlet. The outlet box 

should be located in the area behind the appliance (see 

section Cabinet Dimensions). The outlet box and supply 

circuit should be installed by a qualified electrician and 

conform to the National Electrical Code or the prevailing 

local code.
The voltage used must be the same as specified on this 

microwave oven. Using a higher voltage is dangerous 

and may result in a fire or oven damage. Using a lower 

voltage will cause slow cooking. The manufacturer is not 

responsible for any damages resulting from the use of 

the oven with any voltage other than specified.

Electrical Connection with Wire Conduit
HMC80252UC
HMC80242UC
HMCP0252UC
The electrical supply should be a 4-wire single-phase AC. 

Install a suitable conduit box (not furnished). An 

appropriately-sized, UL-listed conduit connector must be 

used to correctly attach the conduit to the junction box.

9

WARNING

Local codes may vary; installation, electrical 

connections and grounding must comply with all 

applicable local codes.

If local codes permit grounding through the electrical 

supply neutral, connect both the white neutral wire and 

the bare ground wire from the oven to the white neutral 

electrical supply wire.

Electrical Connection
The four-wire connection is preferred, but where local 

codes permit, the three wire connection is also 

acceptable.

9

WARNING

When connected to a 4 or 5-wire, 120/208-Volt 3-

phase power supply, the phase C conductor is not 

required for the operation of the appliance.

Four-wire Connection
Ungrounded Neutral

Connect the red oven wire to the red electrical supply 

wire (hot wire).

Connect the black oven wire to the black electrical 

supply wire (hot wire).

Connect the white neutral oven wire to the white 

neutral (not bare or green ground) electrical supply 

wire.

Connect the green ground oven wire to the bare or 

green ground electrical supply wire.

Model

Connection

Circuit 

Requirements

HMCP0252UC

4 wire conduit 

cable

208 V, 

60 Hz

20 Amps

240 V, 

60 Hz

20 Amps

HMC80252UC
HMC80242UC

4 wire conduit 

cable

208 V, 

60 Hz

20 Amps

240 V, 

60 Hz

20 Amps

HMC80152UC

NEMA 5-20

120 V,  

60 Hz 

20 Amps

HMC87152UC

NEMA 5-20

120 V,  

60 Hz

20 Amps

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