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ELECTRICAL
IPX1 ACCESS DOOR GASKET
To have the IPX1 rating, the door(s) must be properly installed. This
unit is provided with an IPX1 rated door kit, follow the installation
instructions in the kit for proper installation. Figure 2 shows the
expanded view of the door for reference.
Gasket
Peel off Backing
Figure 2
GENERAL
Installation must conform with these instructions and Local/
National code authority having jurisdiction and requirements of
the power company. In the absence of Local/National codes,
the installation must comply with current editions of the National
Electrical Code, NFPA 70 or the Canadian Electrical Code CSA
C22.1.
An electrical ground is required to reduce risk of electrical
shock or possible electrocution. The water heater should be
connected to a separate grounded branch circuit with over-
current protection and an all pole, full disconnect switch. The
water heater should be grounded in accordance with Local/
National codes.
Voltage applied to the heater should not vary more than +5%
to -10% of the model and rating plate marking for satisfactory
operation.
DO NOT ENERGIZE THE BR ANCH CIRCUIT FOR ANY
REASON BEFORE THE HEATER TANK IS FILLED WITH
WATER. DOING SO WILL CAUSE THE HEATING ELEMENTS
TO BURN OUT AND VOID WARRANTY.
BRANCH CIRCUIT
The branch circuit wire size should be established through
reference to the current edition of NFPA-70, the National
Electrical Code or other locally approved source in conjunction
with the heater amperage rating. For convenience, portions of
the wire size tables from the Code are reproduced here. The
branch circuit should be sized at 125 percent of the heater rating
and further increase wire size as necessary to compensate for
voltage drop in long runs.
CALCULATING AMPERAGE/OVERCURRENT PROTECTION
The rating of the overcurrent protection should be computed on
the basis of 125 percent of the total connected load amperage.
Where the standard ratings and settings do not correspond with
this computation, the next higher standard rating or setting should
be selected.
Portion of Table 310-16 (NFPA-70) follows:
Allowable Ampacities of Insulated Copper Conductors. Not more
than three conductors in Raceway or Cable or Direct Burial (Based
on Ambient Temperature of 30° C, 86° F).
These ampacities relate only to conductors described in Table
310-13 in Code.
For ambient temperatures over 30° C (86° F), see Correction
Factors, Note 13 in Code.
For ambient temperatures over 30° C (86° F), see Correction
Factors, Note 13 in Code.
Wrap Around
Portion of Table 310-18 follows:
Allowable Ampacities of Insulated Aluminum and Copper -Clad
Aluminum Conductors.
Not more than three conductors in Raceway or Cable or Direct Burial
(Based on Ambient Temperature of 30° C, 86° F. These ampacities
relate only to conductors described in Table 310-13 in Code.
For ambient temperatures over 30° C (86° F), see Correction Factors,
Note 13 in Code.
11
TABLE 1
Temperature Rating of Conductor
Size
See Table 310-13 in Code
AMG
60°C
MCM
(140°F)
Types:
RUW, (14-2), T, TW, UF
18
- - -
16
- - -
14
15
12
20
10
30
8
40
6
55
4
70
3
80
TABLE 2
Temperature Rating of Conductor
Size
See Table 310-13 in Code
AMG
60°C
MCM
(140°F)
Types:
RUW, (12-2), T, TW, UF
12
15
10
25
8
30
6
40
4
55
3
65
2
75
1
85
75°C
(167°F)
Types:
RH, RHW, RUH, (14-2),
THW, THWN, XHHW, USE
- - -
- - -
15
20
30
45
65
85
100
75°C
(167°F)
Types:
RH, RHW, RUH, (12-2),
THW, THWN, XHHW, USE
15
25
40
50
65
75
90
100
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